Donald Trump completed a whirlwind final push to stop Democrats from breaking his Republicans’ stranglehold on the US Congress in bitter midterm elections Tuesday. Hitting three states in one day, with a final late rally in Cape Girardeau, Missouri, Trump hammered home his boast that “the Republican agenda is the American dream.” However, after an election campaign marred by extremist violence, opponents called the polls a chance to curtail a president they accuse of deliberately stirring racism and social division in the search for votes. For almost two years, Trump’s rule-breaking, sometimes chaotic administration has enjoyed a free hand from the twin Republican controlled chambers, but the midterms could see him forced to face an opposition with real teeth. The entire House of Representatives and a third of the Senate are up for grabs. According to nearly all pollsters, the Democrats have a good chance of winning the House, while the Republicans are likely to retain the Senate. But with turnout a key unknown factor and pollsters still unsure about the effect of Trump’s maverick style on voters, both parties admit that they may be in for a surprise. While Trump is not on the ballot, the most polarizing US president for decades has put himself at the center of every issue. With a characteristic mix of folksiness, bombast and sometimes cruel humor, he says voters must choose between his stewardship of a booming economy and what he claims would be the Democrats’ extreme-left policies. In a Fox News op-ed on Monday he wrote that the US “has the best economy in the history of our country — and hope has finally returned to cities and towns across America.” At every rally, Trump has vowed to his chanting supporters they will “win, win, win.” But as he touched down in Indiana for the second leg of his final-day tour, even Trump conceded that the House may slip from his party’s grasp. “We’ll just have to work a little bit differently,” he told reporters when asked how he’d live with a Democrat-controlled chamber.