president trump's actions with ukraine a, quote, profound national security concern. coming up, i'll talk to someone who understands the issue better than just about anyone. the very first homeland security secretary, tom ridge. also, as house democrats move at a rapid pace on impeachment, across the aisle, members of the gop are ploying what "the washington post" reports as a scorched earth strategy to defend the president at his behest. will it work?