NEW YORK (CBSNewYork) -- Next week's Republican debate in Salt Lake City has been canceled, Fox News announced Wednesday.

The news came following the decision by all three GOP candidates to drop out, of the presidential forum, CBS News reported.

Donald Trump was the first candidate to announce he would not be attending the debate, citing prior commitments to speak "in front of an important group of people," CBS News reported.

"I am making a big speech the night of the FoxNews debate, but I wish everyone well," Trump said on Twitter.

Shortly after the front-runner's announcement, Ohio Gov. John Kasich and Texas Sen. Ted Cruz also backed out.

"I think we have had enough debates," Trump told "Fox and Friends. "We have had 11 or 12 debates. I did really well on the last one. I think I have done well in all the debates...But I think we've had enough. How many times can the same people ask you the same question?"

"Nobody told me about it," he added. "And I won't be there, no."

The GOP front-runner strengthened his hand with wins in Florida, North Carolina and Illinois Tuesday, but fell in Ohio to that state's governor, Kasich.

With Tuesday's wins, Trump has just about half the delegates he needs to win the nomination outright, CBS News reported.

"If we're 20 votes short or if we're you know, 100 short, and we're at 1,100 and somebody else is at 500 or 400, because we're way ahead of everybody, I don't think you can say that we don't get it automatically. I think it would be, I think you'd have riots. I'm representing a tremendous, many, many millions of people," he said.

Trump needs to win 54 percent of the remaining delegates to clinch the nomination by the time the primary season ends on June 7.

He could reach the goal by winning most of the states that award all of their delegates to the winner.

Trump is trailed by John Kasich and Ted Cruz, but as CBS2's Dick Brennan reported, he is already taking aim at Hillary Clinton with a new commercial.

But Clinton also has Trump in her sights.

"Our Commander in Chief has to be able to defend our country, not embarrass it," she said.

Clinton claimed victory in four of the five states that voted on Tuesday, including Florida. Bernie Sanders is determined to stay in the race.

"You do not have to accept the status quo," Sanders said at a rally on Tuesday.

Clinton and Trump remain the odds-on favorites, if not the most admired by voters.

"We're coming on something I can't remember, the first time in a long time that the majority of both parties don't like either candidate. That's why anything can still happen here," CBS News' Bob Schieffer said.

Clinton said she won't ask Sanders to drop out of the race, after she hung in against Barack Obama in 2008.

Up next for both parties are Arizona and Utah on Tuesday, and Democrats in Idaho will attend caucuses.