Ted Cruz said Sunday on national TV that journalists have told him they have "great exposés" of GOP front-runner Donald Trump, but are waiting until summer to publish them.

Experts resoundingly called the claim far-fetched, doubting that journalists would share their scoop with a political candidate, or that publications would hold a relevant breaking story for four or five months.

Cruz said Sunday on CBS' Face the Nation, "I can't tell you how many media outlets I hear, you know, have this great exposé on Donald, on different aspects of his business dealings or his past, but they said, 'You know what? We're going to hold it to June or July."

Pressed by host John Dickerson, Cruz said reporters told him about the yet-unpublished stories, but he declined to specify which publications they represent.

The Cruz campaign did not answer repeated requests for elaboration Monday, but experts from the journalism field doubted Cruz's claims.

"It does not seem plausible to me," said Al Tompkins, senior faculty at the Poynter Institute, a nonprofit journalism school.

He and others noted there were probably exposés on Trump in the works in major U.S. media; the billionaire mogul almost inhabits the media spotlight. Trump has recently taken fire for refusing to release his tax returns, for hiring foreign workers at his real estate projects and for allegations of fraud lobbed at Trump University.

"Why would the journalists be motivated to share that with Ted Cruz? That doesn't seem to me plausible," said Frederick Schiff, a veteran reporter, political scientist and associate professor of journalism at the University of Houston. "That seems unlikely. That seems suspicious. I wouldn't give it too much credit."

Even if journalists did share their scoops with the Cruz campaign, experts called it highly uncommon for a news outlet to delay publication of a verified breaking story for months.

"For a media outlet to have a story that is complete, that's been verified, and to sit on it until July, it just doesn't seem probable," said Roger Boye, associate professor emeritus at Northwestern University's Medill School of Journalism. "They'd get scooped."

The Washington Post reported Monday that it was not holding any Trump exposés, and a spokesperson for The New York Times told the Post it doesn't time stories to influence elections.