Trump openly encourages Ukraine & China to investigate the Bidens; Three House committees interview key witness named in whistleblower complaint. Special 2-episode edition of The Lead.

Pence on Biden: Must be "above the appearance of impropriety"; First witness in Ukraine probe testifies before 3 House Cmtes; Schiff clarifies after saying committee had no contact with whistleblower; Schiff: Trump's invitation to foreign leaders today "repugnant"; Giuliani says some of the conspiracy theory documents about Bidens, Ukraine Ambassador originated with him; Trump publicly urges another foreign power to investigate Biden; Trump: Ukraine & China should investigate Joe Biden & Son; Trump says Ukraine & China should investigate Bidens, despite no evidence of wrongdoing; Dem Rep Rose: Democrats should not cheer Trump impeachment; Pence insists Trump's Ukraine call was "appropriate"; Sources: Pence aides anxious, frustrated over Ukraine scandal; Pence echoes Trump's debunked claims about the Bidens; Pence claims he didn't discuss Biden with Ukrainian Pres; Trump says Ukraine & China should investigate Bidens, despite no evidence of wrongdoing; Pompeo changes tune on demands for docs, witness testimony; Pelosi denies Minority Leader's request to suspend impeachment inquiry; Pence repeats Trump's debunked Biden conspiracies; Three House committees interview key witness named in whistleblower complaint; George Conway: Trump's "narcissism" makes him "unfit for office"; Voters in critical swing state talk impeachment; New poll: Harris drops 11 points in home stat

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