If it's by a comfortable margin, the blue wave might be bigger than expected. Almost one in 10 say they never had faith in democracy in the first place, and 37 percent report they once had faith but have now lost it. Congressional investigations and potential impeachment proceedings, even though nominal, would likely use up significant bandwidth while a growing number of Democrats and even Republicans are likely to attempt reducing Presidential power in dealing with trade.
Finally, in Wisconsin, despite earlier predictions of a competitive race, Republican Senate candidate Leah Papachristou Vukmir is polling far behind Democratic Senator Tammy Baldwin. "However, this is an unlikely scenario".
"This first midterm, at this check-in moment, to have these different forces converge in different ways, to have the different loud landscape for the House and the Senate".
"But it's all fragile", President Trump warned supporters on the phone, "We have to get out, and we have to vote". But both agreed this election was among the most important of their lifetimes.
Yet, in the campaign, Trump and other Republicans found they could not defend either initiative.
"This is a president who wants this midterm to be a referendum on him, largely because he thinks his own popularity is so great that it will carry Republicans across the finish line", Hudak said.
Trump took credit for the unusual energy surrounding the midterm elections. He says that if the Democrats win control of the House, it will mean a lot of partisan fighting when it comes to President Trump trying to advance his legislative agenda.
Abrams slammed Kemp as a "bald-faced liar" who abused his powers as the sitting secretary of state when he suggested over the weekend, without offering evidence, that the Georgia Democratic Party tampered with the state's online voter database.More news: Saudi prince freed from detention amid pressure over Khashoggi murder
Currently Congress is dominated by the Democrats, but a reshuffle could see the Republicans take control. "They worked very hard to avoid what was widely viewed as the mistake of 2016, which was to be seen as too anti-Trump".
"In one corner would be the class warfare Sanders wing, and in another would be the intersectional, social issues left, and in a third would be the establishment Liberals", Baer said.
Mr Trump sought to place more emphasis on the booming economy at his final campaign rallies but continued to issue dire warnings of an "invasion" of violent criminals among groups of migrants heading to the US.
Democrats' chances to pick up seats have improved in key races in Georgia, Pennsylvania, California and Washington, according to ratings changes by Cook's David Wasserman.
What has President Trump being saying?
"If trade frictions reduce, that allows the market focus to shift back on strong United States growth; and also ease pressure on global growth and in our view would lead to a stronger eventual rally".
Donald Trump is banking on the Republican majority in the Senate and House of Representatives remaining.
Ronna McDaniel, head of the Republican National Committee, said on ABC's "This Week" program that the media had chosen to focus on Trump's immigration rhetoric but the president was also emphasizing economic and job gains under his presidency. Democratic Senate incumbents are up for re-election, for example, in North Dakota, West Virginia and Montana - states Trump carried by 30 percentage points on average two years ago.