From Caitlin Yilek writing at The Hill:

Republican presidential candidate Sen. Lindsey Graham (R-S.C.) says GOP front-runner Donald Trump is doing so well in the polls because nearly half of Republican primary voters think President Obama is a Kenyan-born Muslim.

“Well there’s about 40 percent of the Republican primary voter who believes that Obama was born in Kenya and is a Muslim,” Graham told Boston Herald Radio on Friday, according to BuzzFeed News.

“There’s just a dislike for President Obama that is visceral. It’s almost irrational,” Graham added.