Real Clear Politics says there are 36 toss-ups, 31 of which are Republican. Trump has falsely claimed that millions of illegal votes were cast in 2016, depriving him of a victory in the popular vote, and he has stoked concerns, without providing evidence, of rampant fraudulent voting. "We are in this together, and we rise and fall as one nation", Obama said.
"If we don't make any progress in this election, I don't know where we'll go from here", Reh said.
As much as the President will be celebrating, Kyle Kondik says he will also be relieved.
The party of a first-term president tends to lose congressional seats in his first midterm.
Trump, Sanders said, was "the most racist, sexist, homophobic, bigoted president in history", adding later for good measure that Trump was a "pathological liar". It all comes down to whether, in the Trump era, Democrats should nominate heterosexual white men with more moderate views - who theoretically could more easily appeal to Republican-leaning moderates and independents. A Republican in California, fighting for what seemed like a hereditary seat, has called his challenger a "terrorist". Even if Republicans can just win red states, that could be a four- or five-seat gain.
This outcome might not be all roses for the President though. "However, I believe that if the Democrats take over one chamber of Congress, such as the House, they will hold oversight hearings and make life hell for immigration officials who have been responsible for separating children from parents or other heavy handed enforcement actions".
"You'll start to see questions being asked about how taxpayer dollars are being wasted, how the government is being used as a piggy bank for the Trump family", Klain says. "Midterms are less likely to mark a major turning point for Dollars than some investors fear", Citi analyst Todd Elmer said in a report.
And Mr Kondik said it would mean immediate headaches for the President. The president also said soldiers would use lethal force against migrants who throw rocks, before later reversing himself.
Kevin Mack, the lead strategist for the group, said voters it had surveyed were more motivated by antipathy for Trump than anything else, and that Democrats remained too "risk-averse". But this year the 45th president has in recent weeks been the target of the 44th, with Barack Obama criticizing Mr. Trump for "fear-mongering" and setting forth examples of what he describes as his lies.
If the Democrats take control of the House of Representatives, they will most likely push for a probe into Trump's 2016 election campaign, and the alleged Russian meddling.
Voters in both parties said they were paying attention.
"Forget about a blue wave", Rubio added.
"What the President might say, or tweet, or attribute this blue wave to ..."
Problem number one, Mr Trump's agenda will likely be stalled until 2020. Standoffs over border-wall money, cutting money for agencies regulating industries and implementing health care programs are likely and could trigger government shutdowns.
"They key thing is the Democrats could actually shut down the confirmation process for judicial nominees, which is pretty significant".
If Trump is trying to push DeWine over the goal line, his endorsement of Rep. Jim Renacci, a USA congressman challenging Democrat Sherrod Brown for a seat in the Senate, is nothing short of a Hail Mary.
A new Washington Post-ABC News poll on Sunday suggested that while Democrats retain an edge in their battle for the House, Republicans could profit from increasingly positive assessments of the economy and by Trump's harsh focus on border security. "But I have never seen such an enthusiastic Republican Party". "I think the difference will be the brand of Republicans in office, because some of the more right-wing ones were" defeated in primaries.
Meanwhile, in more deeply conservative southern Illinois, Republican lawmaker Mike Bost has championed Trump's steel tariffs, which have fired up shuttered Granite City blast furnaces and led to the rehiring of hundreds of laid-off steelworkers.