Donald Trump's presidential campaign could potentially hit new milestones on Tuesday, as new polling data has shown the businessman threatening John Kasich and Marco Rubio's White House hopes.

Trump Improves Lead in Sunshine State

In Florida, likely Republican primary voters showed more support for Trump than their junior own senator, Rubio. According to a Quinnipiac University poll, Trump led Rubio 46 percent to 22 percent. Texas Sen. Ted Cruz placed third with 14 percent, narrowly ahead of Kasich's 10 percent. Trump won support from both men (52 percent) and women (41 percent).

"At least when it comes to this presidential primary, Florida might change its nickname from Sunshine State to Landslide State. Sen. Marco Rubio, who has staked his future on winning his home state, looks like he'll soon be toast. He trails GOP leader Donald Trump by more than 20 points with polling through Sunday night (March 13)," said Peter A. Brown, assistant director of the Quinnipiac University poll. "There are very few examples of candidates making up that much ground in 24 hours."

The majority of Florida's likely Republican voters (86 percent) have said they've made their minds up on how they will vote in the state's primary, but 13 percent said their vote could change.

In the Democratic presidential race, Hillary Clinton appeared set to have a comfortable win Tuesday. In the poll, she led with likely voters with and without college degrees by 2-to-1 margins, and she was favored by men and women. Overall, Clinton received 60 percent support to Sanders' 34 percent.

Florida's presidential primary takes place on March 15. In the GOP race, 99 delegates are available, and the state is "winner take all," instead of proportional. For the Democrats, more than 214 delegates are at stake, although they will be divided proportionally.

Trump Ties With Ohio Governor

The presidential primary in Ohio, where Kasich serves as governor, will be an important race for the candidate's campaign. Kasich has yet to win any primary state or U.S. territory, and Quinnipiac University's survey indicated potential problems for the governor.

Kasich and Trump were tied at 38 percent in Ohio. Cruz was the only other GOP candidate to receive double-digit figures at 16 percent, while Rubio garnered 3 percent. More Ohioan Republicans than Floridians are likely to change their minds. While 80 percent indicated their minds were set, 19 percent said their votes remained up in the air.

In the Democratic field, Clinton's margin of victory narrowed. The former secretary of state maintained her lead at 51 percent, but Sanders' support increased to 46 percent. Sanders received more support with college educated voters (51 percent to 45 percent), but Clinton led with voters without college education (53 percent to 43 percent).

"Ohio is a real contest on both sides," added Brown. "Trump and Gov. John Kasich are in a dead heat for the Buckeye State's GOP delegates. Almost as close is the Democratic race where Sen. Bernie Sanders has closed 9-point deficit to the smallest of margins. Sanders has the momentum, but the question is whether he can win as he did in Michigan or just come close as in Iowa."

For the Democrats, 143 delegates are available. Meanwhile, 66 "winner take all" delegates are at stake for Republicans.

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