How President Trump factored into Tuesday's primaries

2018 Election: What to expect in Nevada, Virginia, Maine, North Dakota and South Carolina - Philly

2018 Election: What to expect in Nevada, Virginia, Maine, North Dakota and South Carolina - Philly

And while that likely didn't do much by itself, as it came just three hours before polls closed and after many had already voted, it's clear that the man who made it through "hiking the Appalachian Trail" couldn't survive taking on his party's president.

Mark Sanford, who was unseated in a dramatic primary vote Tuesday night after the president urged voters to oust him, told Fox News' "The Story with Martha MacCallum" on Wednesday that his political career is likely over. And he's just out there, I say, in 'Mark-Land.' It's an academic ideology that does not translate to the actual meat of what America is. He is MIA and nothing but trouble.

Arrington narrowly defeated Sanford after Trump tweeted that Sanford had been unhelpful, adding, "He is better off in Argentina".

When Sanford was governor of SC it was revealed he was having an extra marital affair when he claimed he was hiking the Appalachian Trail but was actually in Argentina with his lover, María Belén Chapur.

With 98-percent of precincts reporting, Arrington led the race by about 2,500 votes - enough to avoid a runoff and secure the Republican nomination.

A one-time state chairman of President Donald Trump's 2016 presidential campaign, Stewart almost won the 2017 Republican nomination for governor, despite being heavily outspent.

'She is tough on crime and will continue our fight to lower taxes. Heidi Heitkamp's seat in a state President Trump won by more than 30 points in 2016.

Taking down an incumbent is no easy feat in American politics, but this race was really a referendum on the relative strength of the anti-Trump contingent in the Republican Party as it struggles to hold off the #MAGA cult of personality.

In Virginia, a state legislator favored by the Virginia Democratic Party establishment won a crowded battle for the right to challenge one of the most endangered congressional Republicans in November's elections. In the House, Sanford became known for his principled opposition to Trump and his adherence to limited-government orthodoxy.

'Great night for Republicans!' tweeted Trump. The Congressman's prediction came true, with him conceding to Arrington. "He is better off in Argentina", the president wrote.

He was sacked from the Trump campaign after staging an unsanctioned protest at the headquarters of the Republican National Committee, which Stewart said wasn't sufficiently loyal to Trump during the presidential campaign.

"A lot of Republicans who hid behind Trump's toga in the primary are going to pay a price in November", said veteran Republican consultant Rich Galen, a former aide to ex-US House of Representatives Speaker Newt Gingrich.

AP also projects Charleston attorney Joe Cunningham will be the Democratic nominee in the 1st District.

To be sure, the president's track record of picking winners and losers in elections is not ideal. Earlier this year at the party convention, journalist Leslie Cockburn won the nomination in Virginia's 5th Congressional District. Tim Kaine and choosing nominees in several competitive House races, Nevada and North Dakota choosing their Senate candidates and ME for the first time trying - and voting on whether to keep - a new voting system in which voters rank their preferences, rather than only selecting one.

In the most dramatic result in primaries across five states, Sanford was the second incumbent House Republican to lose a primary this year - the latest victim of intense divisions among the GOP in the Trump era.

Republican Senator Bob Corker, who declined to run for re-election in conservative Tennessee after tangling with Trump, said on Wednesday the party was now in "a unusual place", and not a good one. He also questioned Trump's call for tariffs.