Hillary/DNC paid for the Steele dossier through PerkinsCoie law firm and billed it as legal expense. The FEC said that was improper and fined the campaign $50,000. No felony charged against anyone.
The rule is "After you've WON 2 terms, you can't run again". Grover cleveland ran 3 times, and won the first and third, but lost the second. If it works for a Democrat, it'll work for a Republican.