Barring a month-long legal campaign that overturns the apparent results in multiple states, Donald Trump is not going to be re-elected. It is unclear exactly what legal remedies are available to the president and how many discrete legal challenges would have to be mounted in Pennsylvania, Michigan, Nevada, and elsewhere. The outcomes of each one would be irrelevant to those of the others — legally speaking, he would have to run the table.
It is just about possible to imagine a plausible case in Pennsylvania making its way to the Supreme Court. The basis for this would not be allegations of widespread “fraud” but the Pennsylvania Supreme Court’s decision to override the state legislature, which is supposed to be the final authority on election questions.