There's a lot that can happen Tuesday, the culmination of a long midterm election campaign that will provide the first nationwide measure of the US electorate since Donald Trump was elected president.
A knot of investigations.
If the Democrats win one chamber or both, Klain says, then Congress returns to being a check and balance on the president. The only two presidents who saw their party gains seats - Bill Clinton in 1998 and George W. Bush in 2002 - were exceptionally popular at the time.
The final Rasmussen Reports Generic Congressional Ballot before Election Day shows Republicans edging ahead by one point, but in essence, the two parties are tied. That result, considered less likely even within the White House, would embolden the president as he launches his own re-election bid.
Steyer insisted most Democrats agree.
The president has kept up a record-setting pace of campaigning in this election cycle, holding 30 rallies since Labor Day and 53 events since taking office. He told the AP last month that he won't bear any responsibility should Democrats take over. Out of the 35 Senate contests Tuesday, 10 involve Democratic incumbents seeking re-election in states that Trump won big. "Which might actually not be where you'd want to be going into 2020", Mr Kondik said. That represented a 56 percent increase over the 23.7 million who took part in the 2014 House primaries.
This year, history is on Democrats' side.
"Communism is the past", Trump said at the White House on October 4.
Trump's remarks came as he barnstormed the country delivering fiery speeches on behalf of Republican candidates - and more than a week after Democrats blamed his rhetoric on immigration for a mass shooting by an extremist who attacks a Pittsburgh synagogue, ostensibly because a Jewish organization was helping immigrants. Very tough. They'll need a systematic polling error in all of the races to take this one. "That changes a lot", Wallace said.
And while polls in the USA will not begin closing until well after the market closes, futures markets could be active overnight Tuesday depending on the outcome, with Democrats taking control of both houses of Congress or Republicans retaining control of both houses the outcomes which would likely create the most market volatility. He added that committees will start to investigate various agencies and allow Democrats to zero in on concerns they have about "how big corporate interests are turning our environmental laws inside out at the Environmental Protection Agency and the Interior Department".
"Whether or not the deal is ratified or how quickly it's ratified, whether it has to be tweaked, will all be a negotiation between the 116th Congress - which could well be a different stripe than the president - and the Trump White House", Maryscott Greenwood, CEO of the Canadian American Business Council, told BNN Bloomberg in a recent television interview.
Samsung could soon launch Galaxy Note 9 in Pure White color variant
The foldable phone when unfolded turns into a 7.8-inch tablet. "Simply making a foldable screen is just not enough". It said it will start filling orders from late December, although little is known about the firm's projected sales.
What it would mean: Trump and the GOP losing both the House and the Senate would be a seismic shift, given the inherent advantage Republicans have on both maps.
In the Legislature, all 203 House seats are up, along with 25 Senate seats.
The campaign's final weeks were marred by the worst anti-Semitic attack in modern U.S. history, which left 11 dead in a Pittsburgh synagogue.
Democrats painted sharp distinctions with Trump, insisting that only they will protect the health care gains made under Obama, that Trump has employed inhumane measures to keep migrants out, and that the divisiveness he has fostered must end.
Don Albrecht, a 75-year-old accountant and Republican who voted for Trump in 2016, lives blocks away from the Louisville grocery store where two people died. From stoking fears about illegal immigration to warning of economic collapse if Democrats are victorious.
But with Trump in the Oval Office, she said she felt a responsibility to fight for issues like protecting the Affordable Care Act, "which I feel very proprietary about", as well as making sure there's "a woman at the table".
"This is probably the most important election in the past 100 years". "There's a chance to try and win them back over".
What's more, there have been far fewer statewide and district-specific surveys than in past midterm elections. Republicans were quick to point out that the party in power typically suffers defeats in midterms.
Obama meanwhile did what many Democratic candidates have refrained from doing: directly challenging the president.
The president's critics say the highly charged atmosphere he has helped create made the two attackers feel sufficiently comfortable to carry out their crimes.