Rules got in the way…..
Check it out:

Republican Sens. John McCain (R-Ariz.) and Rand Paul (R-Ky.) faced off late Sunday afternoon, as the Kentucky Republican tried to speak from the Senate floor about expiring provisions of the Patriot Act.

McCain and Sen. Dan Coats (R-Ind.) were speaking about the National Security Agency’s (NSA) phone “metadata” collection program when Paul tried to ask a question. Coats said he had not yielded the floor to Paul, effectively blocking the 2016 presidential candidate from speaking. Coats then yielded to McCain for a question, instead.