A look at former White House chief of staff Reince Priebus

Vice President Pence and Priebus arrive on Capitol Hill on July 25, 2017.

Jared Kushner walks with Priebus during a congressional picnic on the South Lawn of the White House on June 22, 2017.

Vice President Pence greets Priebus as they arrive at the Memorial Amphitheater in Arlington National Cemetery on May 29, 2017, during a Memorial Day ceremony.

Priebus talks with White House senior adviser Jared Kushner at the Royal Court Palace on May 20, 2017, in Riyadh.

Kellyanne Conway and Priebus walk across the South Lawn of the White House on May 17, 2017, after accompanying Trump to the U.S. Coast Guard Academy commencement ceremony.

Priebus arrives in the Rose Garden on May 4, 2017, after the House passed the Obamacare repeal bill.

White House staffers Hope Hicks, Steve Bannon, Priebus and Stephen Miller walk across the South Lawn of the White House to join Trump aboard Marine One as he departs for Harrisburg, Pa., on April 29, 2017.

Priebus walks back to a motorcade after Trump boarded Air Force One at Andrews Air Force Base on April 13, 2017.

Dina Powell, Bannon, H.R. McMaster and Priebus attend a news conference with NATO Secretary General Jens Stoltenberg and Trump in the East Room of the White House on April 12, 2017.

Trump arrives on stage for a Greek Independence Day celebration after he was introduced by Priebus in the East Room of the White House on March 24, 2017.

Bannon and Priebus walk to a meeting with House Republicans on Capitol Hill on March 23, 2017.

Priebus and Bannon arrive on stage during the Conservative Political Action Conference on Feb. 23, 2017, in National Harbor, Md.

Pence and Priebus join Trump as he prepares to sign a confirmation for Defense Secretary Jim Mattis on Jan. 20, 2017.

Priebus and his wife, Sally, arrive for President Trump's inauguration on Jan. 20, 2017.

Priebus and Pence meet with Speaker Paul Ryan on Capitol Hill on Nov. 30, 2016.

Trump and Priebus embrace during Trump's election night event at the New York Hilton Midtown on Nov. 9, 2016, in New York City.

Priebus attends the vice presidential debate at Longwood University on Oct. 4, 2016, in Farmville, Va.

Priebus talks with Ryan while Alaska recounts votes during the second day of the Republican National Convention in Cleveland on July 19, 2016.

Priebus speaks to the media in the spin room after the CNBC Republican debate on Oct. 28, 2015, in Boulder, Colo.

Jeb Bush talks with Priebus after delivering the keynote address at the RNC spring meeting on May 14, 2015, in Scottsdale, Ariz.

Priebus addresses the Conservative Political Action Conference in National Harbor, Md., on Feb. 27, 2015.

Priebus is pictured at the RNC winter meeting in Washington on April 2, 2014.

Priebus speaks alongside Americans and small-business owners who say they have been negatively affected by the Affordable Care Act during a press conference at the RNC headquarters in Washington on Jan. 28, 2014.

Priebus talks with members of the media after speaking at the National Press Club on March 18, 2013, in Washington.

Speaker John Boehner stands on stage with Priebus during the Republican National Convention at the Tampa Bay Times Forum on Aug. 28, 2012.

Priebus speaks to a reporter as preparations continue at the Tampa Bay Times Forum on Aug. 26, 2012, ahead of the Republican National Convention.

Priebus speaks to the press during the fall media walk-through for the 2012 Republican National Convention on Dec. 6, 2011, in Tampa, Fla.

Priebus is interviewed by USA TODAY on Jan. 20, 2011, shortly after he became chairman of the RNC.

Priebus conducts committee business after he was elected chairman of the Republican National Committee during the RNC winter meeting on Jan. 14, 2011, in National Harbor, Md.