(ABC News) – Election Day is upon us, and many Americans have already voted in what could be very eventful midterm elections.
There are 20 states where voters are able to cast their ballots ahead of time, contributing to a changing of the guard in many gubernatorial, Senate and House races. Wisconsin is one of those states.
Here are answers to some of the most burning electoral questions.
Going into the midterms, the Republicans have control of both houses of Congress.
Democrats are hoping that through a few critical elections they’re able to shift the balance of power in one or both houses.
In the House of Representatives, all 435 seats are up for election. In order to take control of the House, Democrats need a net gain of at least 23 seats.
That said, there are several House seats currently held by Democrats that Republicans have been eyeing, including in Missouri, North Dakota and Florida.
In the Senate, 35 seats are up for grabs. Democrats would need a net gain of two seats to take control. Several currently held by Republicans will see tight races, including in Arizona, Nevada, Tennessee, Texas and Mississippi.
Midterm elections are to some extent always seen as a referendum on the current administration and party in power.
This year is no different.
Because Republicans control of both the executive branch, led by Donald Trump, and the legislative branch, holding both the Senate and the House, many voters see the midterms as a chance to either show their support for or disapproval of Trump and his administration’s agenda.
That was the case during President Barack Obama’s presidency when Republicans made massive gains in both the 2010 and 2014 midterm elections.
A similar trend was seen in the second midterm election during President George W. Bush’s administration, as Democrats picked up seats in 2006. This followed the trend’s having been bucked in 2002 when Republicans actually gained seats.
The president has been hitting the campaign trail in support of Republicans in tight races, including Kentucky incumbent Rep. Andy Barr. Trump’s also been to Mississippi on behalf of Cindy Hyde-Smith’s Senate bid.
The president made a “western swing” through Montana, Arizona and Nevada, on behalf of Republican candidates.
If the Republicans lose control of the House, it won’t be Trump’s fault, according to Trump.
“No,” the president told The Associated Press on Oct. 16, “I think I’m helping people. I think we’re going to do well. Look, it feels to me very much like ’16. I was going out and making speeches, and I was getting tens of thousands of people.”
Of the 100 seats in the Senate, 35 are contested.
Some of the most-closely watched are instances where, if the Democrats take over seats currently held by Republicans, including Ted Cruz, that could flip the balance of power. Inversely, there are two Democratic senators, Heidi Heitkamp and Claire McCaskill, facing Republican opponents who could tip the scales the other way.
One of the tightest Senate races is in Arizona, as Republican Rep. Martha McSally and Democrat Rep. Kyrsten Sinema are battling for the seat left open by Republican Sen. Jeff Flake’s decision to not seek re-election.
Every House seat, which carries a two-year term, is open — and many will prove to be nail-biters.
One of the most closely watched is in Kentucky, with Republican Andy Barr and Democrat Amy McGrath are in a tight race. Barr is a former congressional staffer and a lawyer by trade, while McGrath is a former Marine Corps pilot who’s never before run for office.
Another is in Pennsylvania, as Conor Lamb made national headlines when he kickstarted Democrats’ blue-wave ambitions with an upset win in a special election in March. But come November, he’s poised to face even stiffer competition from the incumbent Republican, Rep. Keith Rothfus.
There are 36 governors who are facing a big verdict on Election Day, including Scott Walker.
A whole lot.
According to the Center for Responsive Politics, this election cycle is expected to be the first time midterms have hit the $5 billion mark.