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Mitt Romney, the Republican Party's presidential nominee in 2012, will deliver an address Thursday on "the state of the 2016 presidential race."

In a news release sent to press, no further details on what he will say were provided. But aides to the former Massachusetts governor say they expect him to speak out against Donald Trump, and praise Marco Rubio, Ted Cruz and John Kasich. Romney’s comments will be focused on “the state of the race,” likely echoing past criticism of Trump for failing to release his tax returns, and not decisively distancing himself from the Klu Klux Klan.

Romney has been inserting himself into presidential politics recently. He has taken to Twitter to challenge Trump to release his taxs, saying that the returns will contain "a bombshell."

Close @MittRomney aide says he won't endorse or get in, but tomorrow's speech "will be worth covering" — Andrew Rafferty (@AndrewNBCNews) March 2, 2016

Romney seriously contemplated launching his third presidential bid in 2016 but decided against it.

Whisper campaigns start every few weeks about Romney jumping in, but nothing has yet come of those rumors.

He will talk in Utah at the Hinckley Institute of Politics Forum.

In typical Trump fashion, the GOP frontrunner hit back on Twitter:

Failed Presidential Candidate Mitt Romney is having a news conference tomorrow to criticize me. (1/2) — Donald J. Trump (@realDonaldTrump) March 2, 2016