With his victory in the 2020 presidential election, Joe Biden is set to return to the White House—but will face a far more legally fraught executive branch than the one he departed in 2017.

The election was called Saturday for Biden over President Donald Trump, as outlets declared the Democrat the winner by clinching the key state of Pennsylvania. The president is already suing to try and stop the counting of votes and has promised to take the election before the U.S. Supreme Court, but election law experts are widely skeptical that Trump will successfully change any results through litigation.