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Sanford famously revealed he had secretly left the country in 2009 to engage in an extramarital affair with an Argentine woman. 

Still, he's garnered some high-profile conservative endorsements as election day approaches. In addition to the Tea Party Express, FreedomWorks — another prominent Tea Party organization — announced its support. Sanford has also been endorsed by Sen. Rand PaulRandal (Rand) Howard PaulGOP senator: Democratic opposition to Pompeo 'driven 100 percent by politics' Pompeo lacks votes for positive vote on panel CIA declassifies memo on nominee's handling of interrogation tapes MORE (R-Ky.), Sen. Lindsey GrahamLindsey Olin GrahamKorean peace talks pose new challenge for Trump GOP sold Americans a bill of goods with tax reform law Republicans divided over legislation protecting Mueller MORE (R-S.C.), and Sen. Tim ScottTimothy (Tim) Eugene ScottPartisan tensions rise as Mueller bill delayed GOP dismisses report that tax law will add .9 trillion to debt Gowdy on video questions how long Pruitt is ‘going to make it’ MORE (R-S.C.), whose appointment to the Senate to replace Jim DeMint opened the congressional seat for a special election.

A poll released Friday from the website RedRacingHorses.com showed Sanford and Colbert Busch in a dead heat, with both candidates receiving 46 percent of the vote.

--This report was originally published at 1:44 p.m. and last updated at 2:09 p.m.