- Donald Trump lambasted Mitt Romney on social media Thursday morning
- it came ahead of Romney's speech on the state of the 2016 presidential race
Trump kicked off the social media tirade late Wednesday night, posting a Facebook video
accusing the former Massachusetts governor of being soft on cornerstone conservative issues, including immigration and abortion.
Romney is expected to criticize the GOP front-runner in a speech at the University of Utah's Hinckley Institute of Politics Forum on Thursday.
The business mogul, who himself has changed positions on abortion, continued hitting Romney and the Republican establishment Thursday morning in a series of tweets.
"I have brought millions of people into the Republican Party, while the Dems are going down. Establishment wants to kill this movement!" Trump tweeted.
The GOP front-runner also tweeted he is the only GOP candidate capable of beating Hillary Clinton.
"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"," he tweeted.
Trump noted that Romney had badly sought Trump's backing when he ran in 2012.
"Why did Mitt Romney BEG me for my endorsement four years ago?" he said.
Trump continued his anti-Romney offensive on morning television Thursday, calling Romney's 2012 presidential bid "one of the worst presidential campaigns in history" on MSNBC's "Morning Joe."
"The biggest story in politics isn't Mitt Romney, it's that the GOP is getting millions and millions of people to vote for me," Trump said.