Watch this video. Eastman narrates the White House meeting during which he explained to Pence that he COULD hold off the EC vote for a short time.
Pence didn't, of course. And Pence also lied about the advice Eastman actually gave him.
Lots of other information, most of which is known.
It's also clear that several courts walked away from the cases. Was it dereliction of duty? Probably. Apparently it was the (D) Party's turn or something.