Donald Trump is set to receive his first intelligence briefing on Wednesday. Under the rules set up by the Office of the Director of National Intelligence, a major party presidential nominee can bring two advisers with him as he or she is briefed on threats facing the United States.

Trump chose retired Lt. Gen. Mike Flynn, the former Defense Intelligence Agency director, who would likely hold a national security post in a Trump administration, and New Jersey Gov. Chris Christie, a longtime friend, who was first of his former rivals to endorse him, and is seen as a possible future attorney general.