It's not in the constitution, but it is in both federal and state laws. That's why the Arizona Attorney General is investigating the fraudsters to see what laws they violated. I suspect some lawyers at the DOJ are investigating as well. These things take time.
Some people thought Rudy would suffer no consequences for his illegal lawyering, but now he's lost his license in New York and Washington, D.C. Sidney Powell is next:
Powell and her co-counsel will appear Monday at a hearing on Michigan officials' request for the attorneys to be sanctioned over their “frivolous” lawsuit, which they allege Powell brought “to undermine the integrity of the election results and the people’s trust in the electoral process and in government.”
from: Judge Shoots Down Powell Again