‘Off the rails!’: Trump defenders go ‘full Mulvaney’ as bribery testimony demolishes Trump

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Republicans are on defense as damning impeachment evidence goes public. Trump allies are bracing for public hearings as The White House beefs up their legal team. NPR’S Ayesha Rascoe and David Frum, former speechwriter for President George W. Bush join MSNBC’s Ari Melber.