While that complaint that the president allegedly asked the Ukrainian leader for assistance in investigating his political opponent is what started the Democratic impeachment investigation – and Trump has focused his attacks on the whistle and his "perfect" appeal – Democrats say evidence gathered by current and former Trump administration officials has strengthened their case so far.
It also details a picture of an administration that for months has struggled with Giuliani's central role in dictating US and Ukrainian policy – with senior US officials hampered by Trump's request to deal with his personal lawyer, who pursues studies that could assist the president's political interests.
Now they claim that they may not even need to talk to the liquidator.
"The testimony and evidence I received all supports the central narrative that there was a formal policy that was very supportive of Ukraine," said reporter Tom Mal inowski, a New Jersey Democrat. "There have been numerous officials trying to keep this policy alive. But she has run into shadow politics, led by the president through Rudy Giuliani, which is intended to promote his personal and partisan agenda. "
Democrats say Mulvaney is helping to make his case.