our cbs reporter, kenneth craig has moore on the latest developments. >> reporter: president donald j. trump lashed out on social media calling the impeachment inquiry a fraud against the american people as his motorcade drove him to his virginia golf resort. friday house democrats subpoena the white house for documents from pants, he downplayed the inquiry at a rally in louisiana on saturday. the impeachment inquiry centers on a whistleblower report of a phone call in which president trump asks the ukrainian president to investigate the former vice president, joe biden and his son for corruption. hunter biden worked for ukrainian energy company while his father was vice president. there is no evidence of wrongdoing. this week the president invited another foreign government to intercede . >> china's just should start an investigation. >> reporter: the president says asking foreign governments to investigate the bidens is not about politics. >> i don't care about the campaign i do care about corruption. >> reporter: biden fired back . >> this is a guy who is unhinged. i worry about wh