So the challenge is whether the evidence revealed in public hearings is enough to sway public opinion and convince enough Republican senators to vote to remove the president. They make the case that Democrats failed to present any evidence of quid pro quo in Trump's July 25 call with Ukrainian President Volodymyr Zelensky.
The House will hold the first public hearings of the inquiry this week as they investigate whether Trump violated his oath of office by pushing Ukraine to investigate his political rival.
The President wrote on Twitter today that the inquiry should be ended and the unnamed whistleblower, the whistleblower's lawyer and "Corrupt politician" Mr Schiff should be investigated for fraud.
McClatchy Newspapers: "Trump readies for public phase of impeachment inquiry with new hires, Hill meetings" - "In a quest to streamline its messaging on a fast-moving Democratic impeachment inquiry, the White House has hired two top communications specialists to lead their public response and is sending aides to Republican strategy meetings on Capitol Hill". Democrats now hold a solid majority, 233 seats to 197 for Republicans, with four seats now vacant and one held by an independent.
Graham, the Senate Judiciary chairman, was already this weekend predicting acquittal in the Senate, which has the duty to conduct a trial and consider removing Trump from office if the House impeaches him.
William B. Taylor, chargé d'affaires, perhaps the highest profile witness listed, was America's top envoy to Ukraine, taking the role after former US ambassador Marie Yovanovitch was ousted in May.
Mr Taylor told lawmakers in closed-door testimony he was unhappy the administration had held up the congressionally approved aid to help combat Russia-backed separatists in the eastern part of Ukraine.
Mr Taylor said he also became uncomfortable with what he described as an "irregular channel" of people involved in Ukraine policy, including Mr Rudy Giuliani, the president's personal lawyer.
Baby Archie gets his first teeth and starts to crawl
The event was supposed to also be attending by Duchess Camilla , but she was forced to pull out due to a chest infection. Meghan exclaims in the clip, before gesturing to the child's bottom gum and saying, "Archie just got two teeth".
Kent also said Giuliani had engaged in a "campaign of slander" with no basis in fact against U.S. Ambassador to Ukraine Marie Yovanovitch.
On Friday, the committee will hear from Marie Yovanovitch, who Mr Trump removed as U.S. ambassador to Ukraine in May.
Friday - Yovanovitch will testify publicly about her recall at Trump's request. Mr Giuliani had been actively trying to get Ukraine to carry out investigations of the Bidens. "So you'll read the second call and you'll tell me if you think there's anything wrong with it". "I would love to hear from other Americans that served on the board of Burisma", Hurd said, referring to the natural gas company that paid Biden $50,000 a month to sit on its board while his father was the vice president. We were very clear.
"We tried to clarify, there's no guidance for DOD at this time". At the end of those hearings, the Democratic-controlled committee will vote on specific articles of impeachment, based on the US Constitution's standard of "treason, bribery, or other high crimes and misdemeanors", and whether Trump's actions constituted abuse of presidential power.
House Republicans have released their list of witnesses they would like brought before the committee, including Hunter Biden and the whistleblower.
Mr Trump and Mr Giuliani have made accusations - without providing evidence - that Joe Biden sought the dismissal of a Ukrainian prosecutor to block a corruption probe of Burisma.
The Democrats, led by House intelligence committee chair Adam Schiff, want to show that the president used the State Department and other sections of the bureaucracy to advance his personal political goals and undermine USA foreign policy. The president's lawyers will not be allowed to do so - something Mr Trump has complained about bitterly.