and for clarify, i'll repeat that it has no validity. >> in addition to requesting the probe of the bidens, trump asked the president of ukraine, to look into whether a computer base in ukraine had been used to hack democratic servers. in other words, the possibility that ukraine had meddled in the u.s. elections, not russia. bossert said he told trump again and again that it was simply not true, to no effect. as preparations for the impeachment inquiry wrap up, house speaker nancy pelosi tells fellow democrats, it's not about politics or partisanship, it's about patriotism. she told "60 minutes" that president trump painted himself into an impeachment corner. >> we could not ignore what the president did. he gave us no choice. it wasn't a change of mind. i said, we will follow the facts where they take us.