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Republican Governor challenging Trump in 2020: He is impeachable

09:57

Republican Bill Weld, a former governor, former federal prosecutor and GOP veteran who served as counsel to the House judiciary committee, joins MSNBC Chief Legal Correspondent Ari Melber to discuss why he is challenging President Trump for the 2020 Republican nomination. Weld says he was previously “against” impeaching Trump, but that his position “needs a little re-thinking in view of the brazenness” of both Trump and his Attorney General Bill Barr.