Mr. Trump wrapped up the midterm campaign by rallying Sunday with Tennesseans who could determine whether the GOP expands its 51-49 Senate majority, as Republican Rep. Marsha Blackburn vies with former Democratic Gov. Phil Bredesen for an open Senate seat, before heading to Missouri Monday to try to flip a Democratic seat into the red column.
Donald Trump and his Democratic rivals made frenzied, final pushes to motivate their core voters on Sunday (Nov 4) ahead of contentious midterm elections seen as a referendum on the president's divisive first two years in office. He hammered Trump and Republicans for repeatedly trying to repeal his signature healthcare law while at the same time claiming to support the law's protections for those with pre-existing conditions.
Mr Obama, campaigning on behalf of candidate Joe Donnelly, added: "The only check right now on the behaviour of these Republicans is you and your vote".
"The character of our country is on the ballot", he said. The one issue they both agree on: Trump.
The elections on 6 November to the 435-member Congress and 35 of the 100 seats in the Senate will decide if the Republican party, which Trump represents, continues to control legislation in both Houses or whether it will go into the hands of the Democrats.
To take control of the Senate, Democrats need to keep all the seats they now hold, and take two further seats, which is harder than it sounds.
He told supporters to "look at what is marching up - that's an invasion". He said Democrats encouraged chaos at the borders because it was good politics.
The charged atmosphere is expected to drive record turnout in some places, but on the eve of the election, it is far from certain which side will show up in the greatest numbers.
On Friday, the Labor Department's monthly employment report produced a string of positive numbers: another month with the unemployment rate at 3.7 percent, the lowest in half a century; 250,000 jobs added to the workforce; and wages posting the biggest increase in nearly a decade and faster than inflation.
"They must be pretty scared on the Democrat side if they're pulling out the big guns and they have Barack Obama out campaigning", she said. "You hear those Republicans brag about how good the economy is, where do you think that started?" he asked.
"We are seeing that in the early voting in all of these key House and Senate races, and Republicans have been matching, so literally Election Day voting is going to determine the balance of the House".
Their appearances on the campaign trail are considered effective because Trump and Obama are regarded as the most popular figures in their parties.
"If they take back the house, he essentially will become a lame-duck president, and he won't win re-election", said Amy Kremer, a Tea Party activist who leads the group, Women For Trump.
US Senator Chris Van Hollen, who heads the Democratic Senate campaign arm, said it was "remarkable" that Democrats were even in striking distance of capturing the Senate given the unfavourable map they faced.
The Post-ABC News poll was conducted last Monday through Thursday, the day before the employment statistics were announced, and records the most optimistic attitudes about the economy in almost two decades, with 65 percent of all Americans rating the state of the economy as good or excellent and 34 percent offering a negative assessment. Trump has seized on the nativist us-versus-them message that resonated with his base during the fiery 2016 campaign as he races across the country to secure votes, using inflammatory language as he paints a country under threat from hordes of illegal immigrants, rampant crime and far-left Democrats. Around 37 percent of eligible voters took part in the 2014 midterm elections, down from 42 percent in 2010. That is up 67.8% from the 20.5 million early votes cast in all of 2014, the last federal election when the White House was not at stake.