Former senator Jim DeMint (R-S.C.) said in an interview broadcast Tuesday that congressional Republicans who oppose the Defund Obamacare effort "should be replaced."

"I'm not as interested in the political futures of folks who think they might lose a showdown with the president," DeMint said at a Monday town hall hosted by Heritage Action, the political arm of the Heritage Foundation, which DeMint leads.

DeMint later told NPR: "I think (President Obama) knows that Republicans are afraid, and if they are, they need to be replaced."