Washington — As the US mid-term election campaign enters the final stretch before Tuesday’s vote, many races are too close to call but most polls have Democrats seizing control of the House of Representatives — and Republicans clinging on to the Senate.

President Donald Trump is ratcheting up the rhetoric and campaigning furiously as he seeks to hold on to the Republican majorities in the two chambers of Congress.

All 435 seats in the House are up for grabs on Tuesday while 35 seats in the 100-member Senate are at stake. Americans will choose new governors in 36 states.

Republicans currently have a slim 51-49 hold on the Senate, where Democrats have a tough hill to climb with 26 Democratic seats on the ballot, while Republicans must only defend nine.

Democrats need a net gain of 23 seats to take control of the House they lost in 2010, and House minority leader Nancy Pelosi predicted this week they would do so.“Democrats will carry the House,” Pelosi said on “The Late Show With Stephen Colbert,” while also forecasting victory in the Senate.

Political forecasting outlet FiveThirtyEight.com gives Democrats a 5 in 6, or 84.5 percent, chance of gaining control of the House but only a 1 in 7, or roughly 15 percent, chance of winning the Senate.

As election day approaches and with turnout a major factor, Trump has sought to drive Republicans to the polls and rekindle the enthusiasm of his successful 2016 presidential bid.