attorney, rudy giuliani, has suggested that then vice president biden tried to stop an investigation into a ukrainian company that named hunter biden to the board. >> did you ask the ukraine to investigate joe biden? >> no. actually i didn't. >> so you did ask ukraine to look into joe biden. >> of course i did. >> biden today -- >> not one single credible outlet that's geffen any credibility to his assertion. >> house democrats still demanding details from the trump administration about the complaint. >> this was about wrongdoing. and the idea that that complaint which was intended for congress should instead end up in the white house. is disturbing beyond belief. >> and in a new statement, former vice president biden is calling on the white house to release any transcript of the call in question. adding if what's being reported is true, then he says there is no bottom to president trump's willingness to abuse his power. >> nbc's halle jackson. joining me, kevin developi,