Over the past two years, congressional Democrats furious with corporate America's cooperation with the Trump administration have been limited to voicing their displeasure through sternly worded letters.

But once the midterm elections are over, some of those Democrats are likely to gain subpoena power, and the companies in their crosshairs are bulking up their defenses accordingly.

Polls show Democrats are clearly on track to recapture control of at least one chamber of Congress.

While shifting political winds normally prompt companies to hire new people and adjust strategy, some Democrats who could become committee chairs are signaling they are ready to launch a relentless, concentrated offensive to answer voters' discontent over suspected corruption and the direction of the economy.

The business world views the coming confrontation as a crisis and is spending money as if responding to an emergency.

New lobbying registrations surged this autumn. A growing number of companies are hiring representatives with close ties to the Democrats likely to lead investigations into their dealings with the Trump administration, and with experience helping companies and CEOs navigate congressional oversight hearings.

CEOs are bracing for a disquieting yet seemingly unavoidable scenario: testifying publicly before openly hostile questioners to explain how they complied with the demands of a powerful president, and why they acted as they did.

People across K Street, a nickname for Washington's lobbying industry, say this round of intensive preparation is unprecedented. It reflects both an awareness that President Trump's second term is unusually transaction-oriented and Democrats' fury at companies they see as collaborators with the Trump administration.

Signals of a "Reckoning"

Consider the companies that donated to the White House ballroom project.

Apple (NASDAQ: AAPL), for example, hired lobbyist Jeff Miller, who is close to Trump, during the 2024 presidential campaign. Last month, the company added Arshi Siddiqui to its lobbying team. Siddiqui, a former aide to then-House Speaker Nancy Pelosi, will advise on "tax, trade and technology-related issues." Apple also hired Liz Allen, a former senior State Department official in President Joe Biden's administration who served as chief of staff to Tim Walz during his 2024 vice presidential campaign.

Microsoft (NASDAQ: MSFT), another company that donated to the White House ballroom project, disclosed in August that it had contracted with Rivendell Group to add two former Democratic aides to its outside representation team.

Palantir (NASDAQ: PLTR), also a donor to the White House ballroom project, expanded its outside lobbying team as well, hiring a lobbying firm with ties to both parties.

In late spring, the defense contractor, which has won a large number of federal government contracts over the past two years, brought on a team led by top lobbyist Steve Elmendorf. Elmendorf is a longtime senior adviser to House Democrats and worked on John Kerry's presidential campaign. The team also includes former Alaska Democratic Senator Mark Begich.

Reports this week said a spreadsheet documented $333 million in donations to the White House ballroom project from private donors, including some companies whose contributions had not previously been disclosed. Among them, Salesforce (NYSE: CRM) made two donations of $1 million each, and its CEO Marc Benioff was also among the donors.

As Salesforce's business with the U.S. government has grown, Benioff has gradually built a close relationship with Trump. Records show the software company has also stepped up its lobbying. This summer, it hired longtime Democratic lobbyist Mary Beth Stanton, as well as Checkmate Government Relations, a lobbying firm with close ties to Trump's inner circle.

Anxiety is not limited to companies that donated to the White House ballroom project. A Republican lobbyist said companies that helped fund Transportation Secretary Sean Duffy's "Great American Road Trip" this summer many of which have business interests with the Transportation Department have expressed fears they could be summoned to Congress to explain their dealings with the Trump administration.

The person also said companies that donated to Trump's inaugural fund, his political action committees and various events tied to the 250th anniversary of the nation's founding which Trump has largely framed as celebrations of himself and his administration are similarly worried.

Democratic strategists say lawmakers can expect enormous pressure from supporters to investigate companies and CEOs with financial ties to Trump and his administration. Lindsey Owens, who heads the progressive economic think tank Groundwork Collaborative, said a growing share of voters across parties believe America's political and economic systems are rigged in favor of powerful interest groups.

"This is now a broadly shared judgment among the American people it is widespread, deeply rooted and clearly expressed," Owens said.

In recent weeks, Owens and her team have been meeting with congressional staff to share a document listing potential investigation targets. The list includes Tesla (NASDAQ: TSLA) and SpaceX, both helmed by Trump ally Elon Musk, as well as Palantir, OpenAI, Amazon.com (NASDAQ: AMZN) and Apple.

Particular attention is focused on technology companies that benefit from a light-touch regulatory stance or tariff exemptions, especially those that have donated large sums to Trump's inaugural committee or White House projects.

Groundwork Collaborative's list also names companies outside the tech sector, including McDonald's (NYSE: MCD), Walmart (NYSE: WMT) and Intuit, the parent of TurboTax. Live Nation Entertainment (NYSE: LYV) was also singled out, after reports that the Justice Department's antitrust lawsuit against the company was settled following Trump's personal intervention.

Potential Democratic investigation targets are generally reluctant to speak publicly about the matter, but they are certainly preparing for lawmakers to probe anything that smacks of self-dealing. A prominent financial industry executive, for example, described a series of adjustments companies have made over the past few months, including rebalancing political donations to court the party expected to take power. A corporate adviser said clients are anxiously looking for ways to avoid being summoned to hearings to explain why they went along with politically unpopular policies.

A K Street lawyer said companies are advising executives to prepare candid answers in advance to explain their dealings with Trump and his administration officials, while comprehensively reviewing internal emails to understand how insiders at the time discussed their responses to the president's demands.

Large lobbying firm Brownstein Hyatt Farber Schreck warned in a client memo this month that companies should prepare now for more aggressive congressional oversight, including possible hearings. At those hearings, CEOs could face questioning while lawmakers use the occasion to score "political points."

"The practical consequences can be substantial, including reputational damage, share price impact, corporate executives testifying, large-scale document production obligations, parallel regulatory investigations and legislative initiatives targeting a company's business practices," the memo said.

Rising tensions

Corporate anxiety has been building this year, in tandem with Democrats' growing optimism about retaking the House and possibly the Senate as well.

Peter Orszag, CEO of investment bank Lazard and a former budget director in the Obama administration, said on an earnings call in January: "If the House does flip, what you could see is a lot of hearings, a lot of subpoenas, and a lot of tension between the legislative and executive branches over issues like executive privilege."

"It starts with staff asking questions, then a letter, then a document request," said Thad Trie, a lobbyist at lobbying firm BGR Group who once worked for Illinois Representative Jan Schakowsky.

"By the time it actually gets to a hearing room, the narrative is largely set. That's what we're telling clients through BGR's congressional oversight working group start preparing now, not after the first letter arrives," Trie said.

Capitol Hill veterans see ample opportunities for Democrats to investigate. Henry Waxman, a former California congressman, said: "There's a lot of material here to work with." Waxman is a liberal Democrat who aggressively pushed investigations, led multiple probes during the George W. Bush administration and served as chairman of the House Oversight and Government Reform Committee.

Waxman said Congress has a duty to investigate as polls show deepening public concern about government corruption. A September Gallup poll found that 89% of U.S. adults believe corruption in government is "widespread," including a majority of both Republican and Democratic supporters.

"What has happened during the Trump administration has opened the public's eyes," Waxman said.

Seth Bloom, a lawyer who has represented major companies and served as longtime general counsel to the Senate antitrust subcommittee, said companies that benefited from the Trump administration's light-touch antitrust enforcement could also become key targets.

Maryland Democratic Representative Jamie Raskin is expected to take over the House Judiciary Committee, which oversees antitrust matters. Raskin recently addressed the issue at a conference.

"Congressional Republicans have acted like a bunch of meek followers and sycophants, blindly endorsing the president's improper deals rather than conducting meaningful oversight," Raskin said. "When suspicious deals drive up prices, push down wages and widen economic gaps, they say nothing," he added.

The merger between Paramount Skydance (NASDAQ: PSKY) and Warner Bros. Discovery (NASDAQ: WBD) could also come under particular scrutiny. Of special interest is whether the Trump administration approved the deal on condition that affected media networks such as CBS News and CNN commit to favorable news coverage of the government.

"I expect there will be more oversight. What exactly happened with these mergers?" Bloom said.

In addition, Waxman said Democrats will "absolutely" want to investigate Musk's expansive role in the Trump administration. Waxman called the tech CEO "an easy target for oversight."

But getting answers may prove much harder than asking questions. Waxman believes effective congressional oversight will be more difficult now than when he was at the peak of his career in the 1990s and early 2000s. He noted that congressional staff levels have been cut in recent years, leaving committees with fewer investigators to conduct complex probes. He also expects the Trump White House to resist investigations.

"This is a hostile administration. It's much worse now than when I chaired a committee. I think the executive branch will simply cut off cooperation with Congress and refuse to provide information," Waxman said. "But that only makes the task more important."