The opposite is true. The House inquiry was replete with first hand testimony. The facts those 17 witnesses testified to are not in dispute. There is more corroborating testimony that has not been heard due to Trump's obstruction. Dems want it to be placed in evidence............Repubs do not.In essence you are saying that no one should insist that the case against the president be a strong one and that it be well supported by more than second hand impressions and opinions.
1. Trump directed the OMB to put a hold on military aid to Ukraine.
Pentagon official testifies White House directed freeze on aid to Ukraine
2. Members of the U.S. diplomatic corps for Ukraine were told to work with Slimy Rudy to extract the announcement of an investigation in to the Biden's for Baby Donald's personal political benefit.
Testimony and texts: How the Trump-Ukraine allegations fit together in a timeline
3. Amb. Marie Yovanovitch was removed from her position after a smear campaign was launched against her because she was an obstacle to the Trump/Giuliani scheme to extort Ukraine.
Giuliani brags about forcing out Trump's Ukraine ambassador
4. The transcript of the Trump/Zelensky call, which was attempted to be hidden in a code level secret server, is documentary evidence of Trump's efforts to extort Ukraine.
AP FACT CHECK: Trump's flawed 'read the transcript' defense
The release of the transcript was the last thing Pelosi expected, and is the reason this case is so weak. They couldn't convincingly lie about the call.