will try to turn the tables on democrats, aimed not only to stop the president's removal but to turn the senate trial to his political advance. more from boris sanchez at the white house. >> reporter: dave and christine, with impeachment likely a foregone conclusion, the white house is focusing on the senate and is mounting a robust defense of president trump. the white house is going to try to use this as an opportunity to bash democrats and score points. the president tipping his hand a bit on twitter, writing he may compel some prominent democrats to testify. he writes, schiff, the bidens, pelosi and many more testify and we'll reveal for the first time how corrupt our system is. i was elected to clean the swamp and that's what i'm doing. trump later tweeting it's a good thing that republicans have never been more united. trump will lean on senate republicans to bide a senate trial in a way that's favorable for the white house. and to potentially call up the roster of witnesses he says he would like to hear from. notably the white house counsel, pat cipollone, members of the