I really don’t think they want to open up this can of worms. Besides, since he and Biden are already elected in the Electoral College, if you disqualify him, you just get Biden. If you trash them both, you get Pelosi, so there’s really no good outcome for this particular administration, unless you view it as worth it just for the sake of defending the Constitution.
See, Obama has given me hope.
Even though Biden, Pelosi etc are all fiends, when the messiah has been proved to be a lying fraud, some of the supporting roles may be compromised. The rot goes far. Plus anyone who might fill the spot will be tainted. The thrill will be gone.