That's obvious, I'm just curious what his actual reasoning is behind it being impeachable. If only for grotesque curiosity.
He appears to be arguing that the president acting in foreign policy with concern to his own domestic political fortunes is what Trump was impeached for, which is comically wrong, although I suspect that's what right wing media has been claiming.
Trump was impeached for soliciting illegal campaign help from a foreign power in the form of investigations into his political opponents. He solicited this bribe by illegally withholding aid money to them. This is not complicated.