candidate Donald Trump is seen in a luxury box at the Quicken Loans Arena as setup continues in advance of the Republican National Convention in Cleveland, Ohio July 16, 2016. REUTERS/Aaron P. Bernstein

Signs remind people in the "Team Trump" box that they will be on camera, as preparations continue on the floor of the Republican National Convention in Cleveland, Ohio, U.S. July 17, 2016. REUTERS/Jonathan Ernst

Paul Manafort, campaign manager to Republican Presidential Candidate Donald Trump, and his wife Kathleen ride the elevator at the Republican National Convention in Cleveland, Ohio, U.S. July 17, 2016. REUTERS/Brian Snyder

Paul Manafort (C), campaign manager to Republican Presidential Candidate Donald Trump, walks through the halls at the Republican National Convention in Cleveland, Ohio, U.S. July 17, 2016. REUTERS/Brian Snyder

A worker walks with aTrump-Pence campaign sign in an arena stairwell as preparations continue on the floor of the Republican National Convention in Cleveland, Ohio, U.S. July 17, 2016. REUTERS/Jonathan Ernst

A doorway leads to the "Team Trump" box as preparations continue on the floor of the Republican National Convention in Cleveland, Ohio, U.S. July 17, 2016. REUTERS/Jonathan Ernst

A doorway leads to the "Team Trump" box as preparations continue on the floor of the Republican National Convention in Cleveland, Ohio, U.S. July 17, 2016. REUTERS/Jonathan Ernst

Paul Manafort, campaign manager to Republican Presidential Candidate Donald Trump, talks on the phone from the floor of the Republican National Convention in Cleveland, U.S., July 17, 2016. REUTERS/Rick Wilking

Trump Campaign Chairman Paul Manafort is surrounded by reporters on the floor of the Republican National Convention at Quicken