if the president extorted the leader of foreign country to gin up evidence against a political opponent, does that rise to the level of an impeachable offense? >> you used the worse extortion. that's a crime bp ginning up evidence is manufacturing evidence that's obstruction. yes, those are two crimes. in law enforcement found evidence of those crimes occurred yes impeachment would be warranted. absolutely. >> how long were you in ukraine and what was your job while there? >> there between three and four months in the spring and summer of 2015. one of many details i embarked upon. this one was with the international corruption unit. based out of fbi headquarters. mainly in a training capacity. workedsy sbu, security you service of ukraine, prosecutor general's office and the national anti-corruption bureau. right after the revolution when yanukovych ran out of the country petro poroshenko came in