BOCA RATON, Fla. – Republican presidential front-runner Donald Trump postponed his Monday appearance at Trump National Doral and will hold a rally in Youngstown, Ohio, instead.

Trump appeared at a rally Sunday night in Boca Raton and was scheduled to appear in Tampa on Monday before going to Ohio.

"I don't have anybody's money," Trump said during his appearance in Boca Raton. "Nobody's going to tell us what to do. I'm working for you and I'm working for you. I'm working for you folks."

Fueled by the spirited and unusually tame crowd, Trump wasted little time attacking his two main rivals -- Texas Sen. Ted Cruz and Florida Sen. Marco Rubio.

Trump poked fun at "lyin' Ted" for toting a bible and called Rubio "liddle Marco."

"L-Y-I-N-apostrophe," Trump said of Cruz. "We can't say it the right way."

"He's liddle -- L-I-D-D-L-E," Trump said of Rubio.

Florida's primary will be held Tuesday, along with Ohio, Illinois, Missouri and North Carolina.

Ohio Gov. John Kasich currently has a lead ahead of Trump in Ohio in some polls.

"If we are successful on Election Day, we will do a celebration at Doral after the election," a news release from Trump's campaign said.

Trump's rallies have been the center of some controversy, as they have been the scene of violence and protests.

Security concerns caused Trump to cancel events over the weekend. Trump has called for protesters at his rallies to be arrested and blamed Democratic presidential candidate Bernie Sanders for the protests.

"Bernie Sanders is lying when he says his disruptors aren't told to go to my events," Trump said on Twitter. "Be careful Bernie, or my supporters will go to yours!"

Sanders denied any involvement in sending supporters to Trump's rallies and said Trump has incited the violence at his rallies.

Trump took advantage of his last opportunity to appeal to South Florida voters before the election.

"It's very important to vote, but only if you're going to vote for Donald J. Trump," Trump said.