By the way my official stance on this whole thing is that it doesn't matter because of the Senate, but doing it to upset people was worth it.
Anyway, remember when Republicans were already talking about impeaching Hillary in summer 2016? Pepperidge Farm remembers.
He deserves to be impeached for several different things. They probably should have gone after him for the Mueller Report, but they decided to let that slide. Then you add the Ukraine thing on top of that, and you had to impeach him.
It won't matter because of the Senate, but it will be a black mark on Trump for the rest of his life. They had to impeach him for this. You can't let presidents pee all over the constitution without consequences. Granted, Mitch McConnell will ensure there are no real consequences because all he cares about is keeping power, but nothing the Dems can do about that.