Both Trump's tweet and one of Arrington's ads referred to Sanford's 2009 affair where he flew to Argentina to see his lover while his staff unknowingly told reporters he was hiking on the Appalachian trial. In a February 2017 Politico piece, he said Trump has "fanned the flames of intolerance".
Congressman Mark Sanford is best remembered nationally for a highly public extramarital affair with a woman in Argentina several years ago.
'She is tough on crime and will continue our fight to lower taxes.
Smith has led the pack in fundraising, but recent polling in the race showed many voters had yet to make up their minds.
On Tuesday, five states - Nevada, Maine, North Dakota, South Carolina and Virginia - will vote to determine party nominees ahead of November's midterm elections.
Sanford is in a tight race for the Republican nomination in South Carolina's 1st District on Tuesday. He had originally held the position from 1995 to 2001, winning again in 2013.
As S.C. governor, his rigid ideological conservatism made him a favorite of tea party Republicans while putting him at odds with state lawmakers over spending.
North Carolina Rep. Robert Pittenger was the first incumbent of the year to lose when he was defeated in his primary last month. A member of the conservative Freedom Caucus, Brat, then a college professor, upended the political career of House Majority Leader Eric Cantor in 2014's GOP primary. In North Dakota, GOP Representative Kevin Cramer was declared the party's primary victor, setting him up to run against Democratic Senator Heidi Heitkamp.
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He was the top aide to Trump's presidential campaign in Virginia in 2016, but was sacked for staging an unauthorized protest of the Republican National Committee.
In the state's Second Congressional District, which includes the Hampton Roads region, Democrat Elaine Luria was the declared victor over rival Karen Mallard with 95 percent of the vote tallied.
Within minutes, the Arrington campaign was also blasting out a robocall touting Trump's endorsement and encouraging voters to "get out and vote, even in the rain".
He says he plans a "vicious" general election campaign against Kaine, who battled Trump as Hillary Clinton's vice-presidential candidate and has a huge fundraising advantage.
In Nevada, Democrats are set to nominate Rep. Jacky Rosen to take on Republican Sen.
Seats in the state legislature and U.S. Congress are up for grabs depending on where you live.
North Dakota Republicans chose Rep. Kevin Cramer to challenge vulnerable Democratic Sen.
Primary voters tend to be the red-meat party loyalists, the kind of voter that put Trump into office. Vying to defeat her in November are four Democrats who are facing off Tuesday - state Sen.
Democrats will choose between two Clark County commissioners - Steve Sisolak, a moderate backed by former Sen.