GOP’s impeachment witness Kurt Volker tosses Giuliani under the bus – and makes a damning update to his testimony

Ambassador Kurt Volker offered explosive testimony in his opening statement before the House Intelligence Committee.

Volker, the former U.S. special representative for Ukraine negotiations, was a witness requested by House Republicans.

On live television, Volker both threw Rudy Giuliani under the bus -- and poked a major hole in one of the right-wing conspiracy theories about former Vice President Joe Biden.