A political action committee supporting Sen. Marco Rubio's bid to become the Republican nominee for president will reportedly stop running TV ads after Tuesday.
CNN reported Monday that Conservative Solutions, a "super PAC" that has spent millions in support of Rubio's bid for president, will no longer run TV ads for the candidate following Mega Tuesday's primaries.
"[Conservative Solutions] has spent $9.7 million on Florida TV so far, more than double any other group. But it hasn't reserved air time after Tuesday, according to Kantar Media/CMAG, a media tracking firm," CNN reported.
"In previous contests, the super PAC did reserve air time in advance. Its decision to avoid launching further TV ads now is an implicit recognition that the senator's campaign could be coming to an end if he loses to front-runner Donald Trump on Tuesday."
The CNN story comes as Rubio struggles to rally support in his home state of Florida, with polls putting Republican front runner Donald Trump ahead.
Marc Caputo of Politico wrote Tuesday morning that some Rubio supporters have stated that it would be a "miracle" if he defeats Trump.
"The surveys vary wildly, showing Donald Trump with anywhere from a 5- to a 23-percentage-point lead. But they all share one common trait: A Rubio loss. And they've been that way since August," Politico reports.
"Though Rubio has denied he would drop out if he loses Florida and its 99 winner-take-all delegates, no one believes he's serious. The campaign is running on fumes. Donor money is drying up. The staff can't work for free."
Florida is one of five states holding primaries on Tuesday. The other four are Illinois, Missouri, North Carolina and Ohio.