Tom Wheeler’s time as chairman of the Federal Communications Commission is nearing an end now that Republican Donald Trump has won the presidency. You can expect Wheeler to step down from his chairmanship on or before January 20, when Trump is inaugurated.

It’s customary for the chair to step down when the White House shifts to the opposing party. All five FCC commissioners are appointed by the president and confirmed by the US Senate, with the president’s party having a one-vote majority. (The president usually appoints minority party commissioners based on recommendations made by minority party lawmakers.)

Trump can’t force Wheeler, a Democrat, to leave the commission entirely before his term expires, but the president can designate a new chairperson.