So? You just proved my point. It is designed that if a partisan House impeached a president for purely partisan reasons, which they did twice, that is why a 2/3'rds vote is needed in the Senate to convict, just so that a partisan House would not be able to remove a president from office just because they could muster up a 218-217 partisan vote to impeach. The House impeached Trump twice, knowing ahead of time that a 2/3'rds vote was not going to happen. And, yes, it was all designed this way so that only voters had the real power to remove a president from office, not a partisan House.
Yes, history books will show that Trump may be the only president in history to be impeached twice but history books will also show that we are living in uber partisan times and that a president was impeached twice by a House that knew ahead of time that Trump would not be removed from office and was exonerated twice. In fact, history books will show that an uber partisan House impeached Trump the second time after Trump had already lost the election and was leaving office in just a few days. It will just be the icing on the cake for those history books to show just how partisan we were in these times. The history books may also show that when Republicans take over the House after the midterms, that we were still living in uber partisan times as the uber partisan House shoe will be on the other foot. People of the future will be laughing at how sad both parties were during these times.