Reince Priebus: I never told Donald Trump to shut up
http://www.politico.com/news/stories/0411/53163.html
An RNC spokesman reiterated that Priebus had never said “shut up,” and was asked a question specifically about what he thought of the birther issue. Priebus made clear, as he has before, that he does not buy into to claims, repeatedly discredited by fact-checking and news organizations, that President Barack Obama was born outside the United State, and that he thinks the birther movement drags the party off-message.
IOW, he told Trump to shut up about "birther" claims.