Constitution sets noon on Jan 20th as the last day for the President and Vice President. I believe congress ends early in January but can't remember the date. Congress sets the date of the election and it was set in 1845 and has never changed even in the time of war etc. So what would they delay it to? December? Not worth the effort to even consider it on their part since it all has to be over well before Jan 20th. So no, not going to happen.