"The problem is it's hard to get it to the Supreme Court," Trump said in a telephone interview with Fox News.

The General Services Administration normally recognizes a presidential candidate when it becomes clear who has won an election so that a transition of power can begin. That hasn't happened yet.

Joe Biden and Kamala Harris — president-elect and vice-president-elect of the United States, respectively — are set to be inaugurated on Jan. 20, 2021.