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MIAMI (CBSMiami/AP) — Candidates jetted out of Florida and abandoned their vicious attacks against each other – a new tone that was front and center at Thursday night’s debate.

No longer was Marco Rubio insulting Donald Trump’s hair or hand size. And there was no sign of Trump’s references to “Little Marco” or “Lying Ted.”

A confident Trump also adopted a magnanimous tone, calling for party unity, while Rubio focused on policy differences and turned to Republican competitor John Kasich for help, as the Republican front-runner’s rivals — and the party’s establishment — grasped for any way to slow Trump’s march toward the nomination.

“Clearly John Kasich has a better chance of stopping Donald Trump in Ohio than I do,” Rubio told reporters on Friday, encouraging his supporters in Ohio to vote for Kasich next week.

Supporters of Rubio like Congressman Carlos Curbelo who early voted Friday believe Rubio could pull off an upset Tuesday.

“If people here in South Florida, in Miami, turn out in big numbers for Marco Rubio, he is going to win. We’ve seen polls now that show it’s a very tight race,” said Curbelo.

But Florida International University Policy Analyst Randy Pestana said Rubio has an uphill battle.

“Early voting has been in Trump’s favor whereas absentee ballot voting, seems to be in Rubio’s favor but really it’s going to be tough to tell,” said Pestana.

Voters are paying attention in both Broward and Miami-Dade Counties. More people are voting early than in prior primaries and this weekend we are likely to see an even greater surge.

The extraordinary tactic reflects the increasing sense of urgency looming over the 2016 contest as Trump eyes what would be a devastating sweep in next week’s winner-take-all elections in Ohio and Florida.

In all, 367 Republican delegates are at stake Tuesday in Florida, Illinois, Missouri, North Carolina, Ohio and the Northern Mariana Islands. A win in either Florida or Ohio, some fear, could give Trump an insurmountable delegate lead.

Polls, and the candidates’ travel schedules, suggested that Kasich’s chances in Ohio may be better than Rubio’s in Florida.

Rubio claimed fresh momentum in the state as he campaigned there Friday, but his rivals left him alone in Florida as the day progressed, preferring to campaign in more competitive territory across the Midwest as the Florida senator’s grasp on his home state appeared to be slipping.

Before heading to Missouri, Trump introduced a significant new ally at a news conference at his Palm Beach resort: retired neurosurgeon Ben Carson, who endorsed his former GOP rival and warned that a failure to rally behind him would “fracture the party in an irreparable way.”

Carson said that he and Trump had “buried the hatchet” after months of political wrangling, describing the front-runner as a “very cerebral” person.

Texas Sen. Ted Cruz, the other candidate in the four-man Republican race, embraced the shift toward civility during his lone Florida appearance before heading to Illinois. The fiery conservative’s team desperately wants Rubio and Kasich to lose their home state contests next week, which would likely force both to leave the race and allow Cruz to go after Trump one-on-one.

Even under that scenario, the delegate math would make it difficult for Cruz to overtake Trump before the party’s July convention.

“It’s clear that the civility is aimed at let’s beat the Democrats and the Republicans. After the last two debates, where you know you had the finger jokes. You had everything else there. The Democrats were using that as bait to say look we have real policy issues we’re discussing at our debates. They’re basically a reality TV show,” said Florida International University Policy Analyst Randy Pestana who was at the debate.

Meanwhile, Trump repeated his calls for party unity on Friday, but called a violent episode at a rally the day before “very, very appropriate” after an African-American protester was punched in the face by a Trump supporter.

“That’s what we need a little bit more of,” Trump said during a Friday news conference.

Police charged the man, identified as John Franklin McGraw, with assault. Florida police are investigating another allegation of violence against a Trump protester from earlier in the month as well.

Looking at the Ohio primary, there are signs some local Republicans are already embracing Rubio’s call to support Kasich.

“I believe Marco Rubio has the best chance of unifying the party and winning in November,” said Tom Grossmann, a county commissioner and Rubio supporter. “I don’t think he has any chance of winning in Ohio.”

Kasich spokesman Rob Nichols charged that his candidate is going to win in Ohio without Rubio’s help “just as he’s going to lose Florida without our help.”

Amid the Republican wrangling, Democrat Hillary Clinton is campaigning in Illinois and warning voters about the perils of loose talk.

Without mentioning Trump by name, Clinton said Friday that “when you run for president, it matters what you say.”

In the last few weeks, Clinton said, she’s been getting messages “from a lot of the leaders I know from around the world and their message basically is, ‘What is happening?'”

“Hopefully this is just a momentary lapse and that we will all come to our senses” and have an election based on ideas and who can get things done,” she said.

But Trump on Friday softened his tone, a shift that was apparent on stage at the previous night’s debate: “I can’t believe how civil it’s been up here,” Trump declared at one point in Thursday’s face-off of the GOP’s final four.

(TM and © Copyright 2016 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2016 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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