[oldalum]

he was already impeached for (suspending payments to Ukraine against the express will of Congress)?

You probably meant this as shorthand for what happened, but I think this needs a little more precision. He withheld $400M in military aid in the form of military equipment, the money for which had been expressly appropriated by Congress in (gasp) bilateral fashion and had to be spent by an impending fiscal deadline. It indeed did violate the law (as the GAO concluded: article). But he was not impeached specifically for violating this law, which has been violated multiple times before (including by Trump). The first charge of the impeachment was Abuse of Power, in that, in addition to withholding an Oval Office meeting, he withheld the aid for an improper purpose: pressuring Ukraine to help his re-election campaign.

[oldalum]

he was already impeached for (suspending payments to Ukraine against the express will of Congress)?

You probably meant this as shorthand for what happened, but I think this needs a little more precision. He withheld $400M in military aid in the form of military equipment, the money for which had been expressly appropriated by Congress in (gasp) bilateral fashion and had to be spent by an impending fiscal deadline. It indeed did violate the law (as the GAO concluded: article). But he was not impeached specifically for violating this law, which has been violated multiple times before (including by Trump). The first charge of the impeachment was Abuse of Power, in that, in addition to withholding an Oval Office meeting, he withheld the aid for an improper purpose: pressuring Ukraine to help his re-election campaign.