Trump has not been charged with a crime. This impeachment is literally founded on accusations only.
A sitting president cannot be charged with a crime by the DOJ. (even if they commit a crime)
The sitting president must be taken through the Congress process of impeachment in order to be forcibly removed from office and then the DOJ can charge the ex-president of a crime if that is warranted.
It is a difficult situation, the process is asking politicians to judge if the president is guilty of high crimes or misdemeanours. And deciding amongst themselves whether to throw the president out of office.
Of course the public (being so politically divided) will be suspicious about this being a partisan ploy.
If they throw him out of office and ultimately the DOJ do then not charge him, it will be a huge embarrassment to Congress and would probably cost them the next election with people not voting for them.
If they don't throw him out (potentially a partisan protection, let's say the Democrat run house pass the motion, and then the Republican run senate throw the case out) and once the President eventually goes out of office (be it this coming election or the next one), if at that time the DOJ do press charges and the ex-president gets found guilty in court, well does this have any repercussions on the protecting party? Will traditionally Republican supporters abandon their party as one that protects and harbours crime? By then, I think it is way too late.
So it comes down to the Senate held trial. IF the case against the president is so compelling to the public, will even Republican supporters turn against their party and vote them out in the upcoming election?
It all hinges on how compelling the case will be, and if the defenders can either twist it or if their supporters are willing to support Trump no matter what, even being happy with him committing crimes.
I suspect Republican supporters will be happy with Trump committing crimes as long as it supports their agenda.
If Trump truly is guilty. The one thing that might save him from future legal repercussions, is resigning and getting Pence to pardon him.
If Trump (and the Republicans) is voted out at the next election and then if DOJ charge him, he won't be getting a pardon from the Democrat President.
I'm just really interested to see how this all pans out. It is fascinating stuff.