US equity futures were mixed pre-bell Tuesday as traders await the results of the midterm elections amid the continued release of corporate earnings.

Dow Jones Industrial Average futures were 0.6% lower, S&P 500 futures were flat, and Nasdaq futures were 0.4% higher.

Polls and nonpartisan analysts expect Democrats to win control of the House, while control of the Senate remains uncertain, Reuters reported.

The US carried out strikes against Iran in the Strait of Hormuz on Monday, targeting "Iranians using surface to air missiles against US assets," the Associated Press reported, citing a US official.

Traders also digested the latest round of earnings, with Shopify (SHOP) reporting higher Q3 adjusted earnings and revenue.

Advanced Micro Devices (AMD) is expected to report its fiscal Q3 earnings after the market closes.

Oil prices were higher, with front-month global benchmark North Sea Brent crude up 0.1% at $104.83 per barrel and US West Texas Intermediate crude 0.7% higher at $97.15 per barrel.

September job openings from the US Department of Labor's Job Openings and Labor Turnover Survey, due at 10 am ET, are expected at 7.164 million, compared with 7.079 million in the prior month, according to estimates compiled by Bloomberg. September factory orders, also due at 10 am ET, are expected to have increased 1.2%, compared with a gain of 0.1% previously.