The point here is, that Republicans keep ignoring, is that Biden did it on his own then that evidence would be in the United States, not the Ukraine. As was stated, current evidence shows that the US Government was aware that the loan was conditional on anti-corruption efforts, including that Shokin be fired. And, as was posted, there is evidence of three Republican Senators who agreed with that condition, that the prosecutor needed to be fired.
Now, if there is evidence that the above is untrue -- that somehow Biden lied to everyone and got them all behind firing that prosecutor -- that Biden "masterminded" it, that evidence would be in the United States. The Ukraine would not have the evidence as what Biden did there is largely unchallenged, even he admits that he got the prosecutor fired for corruption.
I'm amazed how suddenly Republicans want to put their faith in someone that is known to be dishonest. With all the claims of how people were lying about Trump, Cohen comes to mind, yet here is a man fired for corruption but, since he says something that helps Trump, he must be telling the truth.
Regardless, all of this is a sideshow that distracts from the crime Trump committed -- it is illegal to ask foreign governments for help with your political campaign. And Trump has basically admitted that is what this is; that while he has used the words "anti-corruption" it is all about investigating Biden. That, with or without holding money (that would just make it worse) is a crime and because he didn't do this with Russian, he was exonerated by the Mueller report.
More to the point, an investigation was already ongoing with Ukraine -- one being done by the Justice Department looking into the 2016 election with a special prosecutor. So why does Trump need a new investigation to look, allegedly, into the same things (since he brought up Crowdstrike)? One done by his personal lawyer working outside any type of official capacity? This helps point to just how corrupt this is; particularly since Giuliani claimed to have found information and, only now after the news leaked, is he suddenly allegedly sharing the information with the government. My guess is, this was not meant to be released until Biden was the Democratic nominee.
I seriously fear for the US if this is "excused" by the Republicans -- it will set a new low for politics in the US. I can't help but think of someone with the morals that Hillary is claimed to have, or Nixon, in the White House. In the future, they will know that they can call up foreign leaders and request "dirt" on those planning to run against them. They'll know Trump was found "not guilty" for the same activities. Please tell me how I don't have to worry about this in the future?