“If he is found guilty in one of the state kangaroo courts, can he be ordered to prison even if he is President?”
Only if impeached by the House and convicted in the Senate.
It’s a foregone conclusion that if Jack Smith is able to bring his case to court he will get a conviction (it will be DC jurors). It’s just a question of whether it happens before the election or not. If after the election, it could be before Jan. 20, 2025. After Jan. 3, 2025, the House may have a Democrat majority and the Senate may also have one. So it may depend on how much the Left loathes Trump’s running mate whether they try to assemble a two-thirds majority in the Senate (Democrats and RINOs) to remove him from office. Could be a shorter Presidential term than William Henry Harrison’s.