Trump, Carson change words to 'Stand By Me' to 'Stand By Trump' at sing-along

There was a Donald Trump sing-along and love fest at a Republican fundraiser.

The GOP frontrunner joined a lounge singer who performed at his Mar-A-Lago estate in Florida on Sunday night. The lyrics to Ben E. King's classic "Stand By Me" were changed to "Stand By Trump" -- and former rival Dr. Ben Carson joined in too.

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Dr. Carson, who endorsed the real estate tycoon earlier this month, will now be "totally involved" in the billionaire's campaign Trump said when spoke at the Palm Beach Country Republican Party's annual Lincoln Day fundraiser.

Trump told the crowd of supporters: "You're gonna love me so much as president. You're gonna be so proud of me as president. I will be the most presidential president this country has ever had, except for Honest Abe Lincoln. ... If we bring our party together, we will win by numbers you've never seen before."

Trump also had to come to the defense of his campaign manager Corey Lewandowski, who was caught on tape yanking a protestor by the collar, over the weekend in Arizona.

"I give [Lewandowski] credit for having spirit," he told ABC's George Stephanopoulos on This Week. "He wanted them to take down those horrible profanity laced signs."

The Trump campaign now says in a statement: "We will be dedicating additional security resources to larger events in the future to prevent staff from having to intervene."

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Further violence erupted on Saturday when one of Trump's supporters punched and kicked a protestor at a campaign rally in Tucson.

Protestors shut down highways in Arizona that lead to a Trump rally.

The GOP frontrunner tweeted:

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