Fmr. WH official: Pence aide had the ‘mark of courage’ to denounce Trump

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David Frum tells Lawrence O’Donnell that Olivia Troye’s condemnation of Trump will change her life forever. The enmity she has created within the GOP will last the rest of her professional life. That, he argues, shows how brave Troye was to come forward. She risked it all to stop Trump.