Tuesday's elections are the first major ones to take place in the U.S. since Russian Federation targeted state election systems during the 2016 presidential race and ran disinformation campaigns with divisive content on Facebook and Twitter.
This happened in 2012, when Democrats in House races received almost 1.5 million more votes than Republicans, with the Republicans nonetheless winning a majority of the seats (by a margin of 234-201). "Vote for the Democrat".
"The contrast in this election could not be more clear". The National Democratic Redistricting Committee, led by former Obama administration Attorney General Eric Holder, has pumped additional money into state races viewed as critical in future redistricting decisions.
"But in four days, Florida, you can be a check on that kind of behaviour".
The thousands packing his midterm rallies in the immediate aftermath of the shocking crimes clamored for Mr. Trump's trademark attacks on political foes.
Why are voters so energised?
The campaigns are canvassing neighborhoods and looking for people who still have not voted.
During the 2016 Presidential election Mr Ryan said he could no longer defend Trump after the infamous "Access Hollywood" tape which referenced groping women was defeated.
What is happening with turnout?
"We did have two maniacs stop a momentum that was incredible, because for seven days nobody talked about the elections", the President said at a Missouri rally last week.
But analysts say a sharp rise is likely this year, with voters on both left and right energised by such issues as healthcare and immigration. AP and Fox News split from the consortium to launch an alternative called VoteCast, relying on interviews conducted just before the election ― an approach AP says "reflects how Americans vote today: not only in person, but also increasingly early, absentee and by mail".
In Texas, early voting has exceeded the entire turnout in 2014.
The companies are offering paid time-off and other schemes to give employees a better chance to vote.
A number of notable races are taking place on Tuesday in the US midterm elections, when Americans go to the polls to elect governors and members of the US House of Representatives and Senate.
Governors are also being chosen in 36 out of 50 states. Kemp is running against Democrat Stacey Abrams, who could become the United States' first black female governor.
Will a blue wave wash away Republican control of Congress or will the GOP buck historical trends to maintain its majority in the House and Senate? Even though the president won IN by 16%, Joe Donnelly was supposed to be one of the endangered candidates with a better chance to hold on.
Republicans are expected to retain their slight majority in the US Senate, now at two seats, which would let them retain the power to approve US Supreme Court and other judicial nominations on straight party-line votes.
But even losing the House would be a blow for Mr Trump, as the situation would create a potential for legislative gridlock and even government shutdown. Most pollsters also agree that the Democrats are unlikely to re-take the Senate, where the races just don't favour them this time around.
Democrats need to gain 23 seats in order to take the House - take a look at vulnerable House seats which Republicans now hold in and around Orange County in California, for example. While they are independent, Sanders and King both caucus with the Democrats, so if they retain their seats and the Democrats have 49 seats, the Democrats will be considered to have control of the Senate.
In the first national election since Trump took the White House, Democrats are expected to gain control of the House but not the Senate.
The former president campaigned in recent days in Florida, Georgia, Indiana and IL for a slate of Democrats running in key Senate and gubernatorial races.