Democrats have a majority in the House of Representatives, from where they are likely to pass the motion to impeach Donald Trump. However, the Senate, which would hold the trial is unlikely to do so because the Republicans have a majority in the Upper Chambers of the Congress.
In the first hearing held by the Judiciary Committee in the impeachment inquiry against US President Donald Trump, House Democrats say he held back military aid for Ukraine while demanding it investigate his political rivals.
On Thursday, David Holmes, a staffer from the US Embassy in Ukraine, who also testified described a conversation he overheard between Trump and US Ambassador to the European Union Gordon Sondland.
The comments come as the House Intelligence Committee prepares for the second week of public hearings as part of its inquiry, which includes Gordon Sondland, the US ambassador to the European Union who allegedly has a significant role in the Ukraine scandal.
Former Ukraine envoy Marie Yovanovitch, known for her staunch ant-corruption stance told the Congressional investigators that she discovered in late 2018 that Trump's personal lawyer Rudy Giuliani was trying to sabotage her reputation.
The whistleblower's lawyer, Mark Zaid, said on Twitter Sunday that his client had made a direct offer to Republican lawmakers to answer their questions in writing.
'Your inquiry lacks any legitimate constitutional foundation, any pretense of fairness, or even the most elementary due process protections,' said President's counsel Pat Cipollone of the probe, which is weighing whether Trump abused his office by seeking a quid pro quo from Ukraine.
