Donald Trump has fired his campaign manager Corey Lewandowski. Trump's campaign spokeswoman Hope Hicks released the following statement:

The Donald J. Trump Campaign for President, which has set a historic record in the Republican primary having received almost 14 million votes, has today announced that Corey Lewandowski will no longer be working with the campaign. The campaign is grateful to Corey for his hard work and dedication and we wish him the best in the future.

The New York Times reported that changes were in the works for weeks and that there has been "a desire" to bring aboard a new campaign manager ahead of the GOP convention next month.

Barry Bennett, a Trump campaign senior adviser, said on Fox News this morning that campaign chairman Paul Manafort is "totally in charge" of the campaign at this point.

Lewandowski made headlines in recent months for an altercation with reporter Michelle Fields at a campaign event in Florida. He faced a simple battery complaint, but the local prosecutor decided not to pursue charges in the case.

Trump steadfastly defended Lewandowski throughout, saying he would have fired his campaign manager at that time if there was any evidence of an assault.

Fox News senior political analyst Brit Hume said he's not surprised to see this move given the way the campaign is going.

"It seems pretty clear from what's happened in the past three weeks that the Trump campaign was woefully unprepared for the kind of national effort that the winner has to mount, and mount pretty quickly, once the nomination is sealed," said Hume.

He noted that Lewandowski never appeared to have the experience needed to run a national campaign of this magnitude.

Watch more above and hear from Trump himself on the matter, tonight at 8:00 ET on The O'Reilly Factor.

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