William McGinley will return to the Trump White House to serve as his White House adviser, President-elect Trump announced.

“I am pleased to announce that William Joseph McGinley will serve as my White House Advisor,” the appointment announcement said. “Bill is a smart and tenacious attorney who will help me advance our America First agenda as I fight election integrity and the weaponization of law enforcement.”

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William J. McGinley speaks at an event organized by BNA about new lobbying laws. (Tom Williams/Roll Call/Getty Images)

The White House counsel typically plays an important behind-the-scenes role in vetting Supreme Court candidates and nominees.

Having already elected three Supreme Court justices in his first term, Trump will have appointed a majority of the court if he gets two more in his second term.

Then-President Donald Trump speaks during an interview with The Associated Press in the Oval Office of the White House in Washington on Tuesday. (AP Photo/Evan Vucci)

McGinley served in the first Trump administration as White House Cabinet Secretary and as General Counsel to the National Republican Senatorial Committee.

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Prior to his political appointments, he was a partner at two international law firms.

William Mears Jr. of Fox News contributed to this report.