The Constitution clearly makes it the resonsibiity of each state to decide how it chooses electors. In fact, it is a minhag to have a direct election – at one time state legislatures chose them.
If a new president, isn’t chosen by noon on Jan. 20, the next person is line would be the Speaker of the House, who is Nancy Pelosi.
Even the most militant pro-Trump fanatics prefer Joe Biden to Nancy Pelosi.