1) congress approved military aid to Ukraine. "power of the purse" belongs to congress. The president can suspend this aid for purpose to benefit the country, but not for personal gain.
2)
Suspending aid causes deaths. If a foreign government acts to benefit a political party and the expense of another, it hurts foreign relations.
3) Biden was a
lready investigated prior to the July 25th phone call. Tampering with election? Mueller investigated this.
4) Biden is at the top of many polls for the 2020 presidential race.
1) Yes, he can suspend funds for that reason, and Trump laid out several. It's the Democrats who claim to be able to read minds, and mind reading should not be grounds for impeachment.
2) Again, no evidence that Trump suspended anything for political reasons. Ukraine officials had no idea the funds were suspended until a month after the phone call. Obviously, they didn't drastically need them at the time. What Trump provided to them in the past was sufficient.
3)Yes, Biden was investigated by his bosses team. What did you really expect, a conviction?
4) The election is a little less than a year away. Trump nor anybody knows who the nominee will be. What is evident is that Biden has been losing ground since spring.