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Rubio’s communications director Alex Conant backed up Rubio's argument earlier today.

“John Kasich is the one candidate in Ohio that can beat Donald Trump,” Conant said on CNN. “That’s stating the obvious. So if you're a Republican primary voter in Ohio and you don't want Donald Trump to be the nominee, John Kasich is your best bet.”

\"PHOTO:
Alex Conant/Twitter
PHOTO: Communications director for Marco Rubio, Alex Conant is see in this undated Twitter photo.
>

He also emphasized that GOP voters in Florida who don’t want Trump to be the nominee need to vote for Rubio. “If you want to defeat Donald Trump here in Florida, where there's 99 delegates at stake, you need to vote for Marco Rubio,” Conant said. “He’s the only one with a mathematical shot.”

Recent polling shows a tight race in Ohio between Kasich and Trump, while Trump holds a double-digit lead over Rubio in Florida polling.

Ohio and Florida hold their primaries on Tuesday, March 15.

ABC's BEN GITTLESON contributed to this report.

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