Hur also knew that Biden being tried by a DC Jury would be acquitted in one second so there would really be no point even trying him
There is nothing an assistant US attorney hates more than loosing a case. That's why they only file cases they KNOW they will win. If its close they just wont file it. There is to much at stake and there are plenty of cases to choose from.
All ASUAs expect to leave office with a 100% conviction record so they can go work for a high paying law firm and start making real money.
Politicly connected AUSAs can go after Trump all day and loose every time. They already have a high paying gig to bail to set up.