Trump Shakes Up Campaign With New Manager and CEO

The leadership changes come after weeks of trouble and sagging poll numbers.

"I've known both of them for a long time," Trump told The Associated Press. "They're terrific people, they're winners, they're champs, and we need to win it."

"I believe we’re adding some of the best talents in politics, with the experience and expertise needed to defeat Hillary Clinton in November," Trump said in a statement.

Sources told ABC News the campaign felt a need for a senior aide to take on a traveling role with Trump to help focus the candidate's messaging. This will be Conway's role as campaign manager.

Bannon will occupy "a new position designed to bolster the businesslike approach of Mr. Trump’s campaign," the statement said, adding that his duties will include oversight of the campaign staff and operations.

Additional senior hires are expected in the next few days, The Associated Press reported.

The Associated Press contributed to this report.