GOP front-runner Donald Trump (Photo: Twitter)

GOP front-runner Donald Trump (Photo: Twitter)

Donald Trump, Republican front-runner, took to Twitter to fire off a range of preemptive attacks against former and failed presidential hopeful Mitt Romney – preemptive because of the widely reported and much-anticipated press conference the ex-governor is due to give Thursday morning about the billionaire’s White House aspirations.

In one post, Trump wrote: “Why did Mitt Romney BEG me for my endorsement four years ago?”

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Another: “I am the only one who can beat Hillary Clinton. I am not a Mitt Romney, who doesn’t know how to win. Hillary wants no part of ‘Trump.'”

LAS VEGAS, NV - FEBRUARY 02: Donald Trump (R) appears at a news conference to endorse Republican presidential candidate, former Massachusetts Gov. Mitt Romney (C) as his wife Ann Romney looks on at the Trump International Hotel & Tower Las Vegas February 2, 2012 in Las Vegas, Nevada. Mitt Romney came in first in the Florida primary on January 31 and is looking ahead to Nevada's caucus on February 4. (Photo by Ethan Miller/Getty Images)

LAS VEGAS, NV – FEBRUARY 02: Donald Trump (R) appears at a news conference to endorse Republican presidential candidate, former Massachusetts Gov. Mitt Romney as his wife Ann Romney looks on at the Trump International Hotel & Tower Las Vegas February 2, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Romney lost his own presidential bid against President Obama in 2012, and again in 2008, during the Republican primary against Sen. John McCain.

In recent weeks, he’s taken to the public podiums to attack Trump, and call him a less-than-desirable candidate for the Republican Party. Advance excerpts of his planned Thursday morning speech include references to Trump as a “phony” and “fraud” who’s “playing the American public for suckers,” as WND reported.

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Trump, who’s leading national polls and who just won big on Super Tuesday – bolstering his delegate count to 319 compared to second-place Sen. Ted Cruz’s 226 – has been fighting many within his own party for campaign respect.

In another tweet Thursday morning, he wrote: “I have brought millions of people into the Republican Party, while the Dems are going down. Establishment wants to kill this movement!”

And another: “Failed candidate Mitt Romney, who ran one of the worst races in presidential history, is working with the establishment to bury a big ‘R’ win!”

Yet one more: “Looks like two-time failed candidate Mitt Romney is going to be telling Republicans how to get elected. Not a good messenger!”

And another, shortly after Romney’s announced press conference made the media waves: “Just another desperate move by the man who should have easily beaten Barack Obama.”

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