WATCH: Why Is Sen. Lindsey Graham Single? According to Gina Yashere, 'He's Gay'

Ever since he announced his bid for the White House, Republican presidential candidate and U.S. Senator Lindsey Graham of South Carolina has been the target of political speculation as to why he is a single, unmarried man.

Comedian Gina Yashere put it all to rest on last night's episode of The Nightly Show:" joking, "because he's gay."

"He's single, he's a bachelor, and they ask him, who are you going to have your first lady, and he says, 'I've got a sister.' He might as well have come out at that point, right?" Yashere, who is out, said in a panel on the Comedy Central show that is hosted by Larry Wilmore.

"But sometimes people, when they make that insinuation, like there's something wrong with you if are you are single at a certain age, they always put you down as damaged or gay," Wilmore responded. "Like those are related!"

Wilmore also pointed out that if elected president, Graham would be the first single man to hold the office since James Buchanan was elected in 1856.

Of course, this isn't the first time the perpetual bachelor has been the subject of speculation regarding his sexuality and dating life -- or lack thereof.

The South Carolina lawmaker (who has a lengthy anti-LGBT record) told a reporter in 2010 "I ain't gay!" when asked about his sexuality, and on Thursday, a Republican colleague, Sen. Mark Kirk of Illinois, was overheard calling Graham "a bro with no ho" during a vote in the Senate Appropriations committee.

Watch the entire Nightly Show segment below.