There has been an 8-year witch hunt looking for a way to shut Trump down, with 10s of millions of dollars spent accessing and scrutinising his affairs looking for a legal attack vector. Likely no politician could have withstood that level of scrutiny without some sort of technically-illegal activity turning up.

A big part of the rule of law is treating people equally. Given the lead up, this is probably a question of selective persecution.

"some sort of technically-illegal" is a funny way to describe a combined lawfare coup / violent coup attempt.