They can file whatever they want to file. The court will tell them that the electoral college hasn’t even met yet, and won’t meet until the middle of December. Until they meet and vote there is no President-Elect. AT ALL. Technically, the President-Elect doesn’t exist until the first week of January when Congress reads the results of the Electoral College Vote.
Biden HAS to know this after 47 years of government service. He’s been through it as an elected official at least 11 times. This is just a way for him to further incite the retarded portion of the populace to violence.
It wasn't valid back then and it's not valid now.
There are recounts, audits, court cases and challenges of the existing count going on yet in multiple states.
Nobody is president elect, even if Trump doesn't concede. Threats of suing to get your way will get you laughed out of court right now. But go ahead and try and make fools of yourselves.
I see he revived Obama’s “Office of the President-Elect” sign.