Prominent conservative legal scholars are increasingly raising a constitutional argument that 2024 Republican candidate Donald Trump should be barred from the presidency because of his actions to overturn the previous presidential election result.
Laws don't say "a person who committed a crime, if the fact that this crime has been, in fact, committed by that person, has been decided by a judge, who has previously passed the exam necessary....". Laws imply a few basic assumptions. One assumption is, that every decision by "the government" is in principle dependent on the judicial system.
If the IRS decides, you're a millionaire now and taxes you accordingly, you can go to court and they will decide whether you're actually taxable as a millionaire.
Trump may be deemed a traitor/insurrectionist by Congress/Senate/DOJ or any other body and thus barred from running, but he too can simply go to court and let it be decided - and given that the supreme court is, let's say, rather in his favor, the result is rather obvious.
Trump will use any loophole, any slight formal error to get around this. So you have to have a really water tight case.