They include important presidential-year swing states such as Florida, Ohio, and Pennsylvania that helped seal Trump's victory two years ago.
But the race's two other candidates have both positioned themselves as outsiders, banking on voters' desire to elect political newcomers.
Rep. Mark Sanford, R-S.C. - a former SC governor who has never lost a bid for political office - is sweating Tuesday's primary against a newcomer who has portrayed him as a disloyal Never-Trumper, Politico reported.
In Nevada, the parties will choose their nominees in two competitive open seats. He ultimately voted for a GOP replacement measure, a decision that Rosen will try to exploit in a year when health care is one of the top issues with voters. Dean Heller. And in North Dakota, Republicans will pick Rep. Kevin Cramer to challenge Democratic Sen.
If Fenty were to win the primary, reflected Condit, "I think she brings something very different to the Republican Party than the state of Virginia Republicans are accustomed to". He enjoys high name recognition and has a hefty campaign account.
Traditionally, only 15 percent of registered voters turn out for primaries. "VOTE Katie!" Trump tweeted. Trump has appeared with Heitkamp, and she was the only Democrat invited to the White House for the signing of the banking law. Tarkanian is instead seeking a House seat.
'We need a seat at the table.
The state's tightest House race is in the 10th district, which includes part of Northern Virginia.
Now, McMaster - who finished third behind Haley in a four-way GOP governor primary in 2010 - is running for a full term on his own merit.
There are three candidates, including Sanford, in the Republican primary.
Because no Democrats are contesting incumbents Rep. Donald McEachin (D - 4th District) and U.S. Sen.
"This is about a president who presents a grave danger to our democracy", he told ABC News. Tim Kaine. As a moderate who gained national prominence as Hillary Clinton's 2016 running mate, Kaine is widely expected to win - not even counting the possibility that Republicans could make another Roy Moore-style blunder. In 2013, he won a special U.S. House election in South Carolina's 1st District, which he previously represented for six years.
In the 10th Congressional District, incumbent Rep Barbara Comstock is widely viewed as one of the nation's most-vulnerable Republicans. Arrington has sought to use Sanford's frequent criticism of Trump as a wedge with GOP primary voters.
The Senate landscape will become more settled Tuesday night as well.
Some Democrats are upset that the Democratic Congressional Campaign Committee has already backed Luria before the primary. Republican Mary Mayhew is the only woman running in a four-candidate Republican primary.
On the Democratic side, voters also face a choice between political experience and newcomer perspective.