Follow CBSDFW.COM: Facebook | Twitter

WASHINGTON (AP) – Mitt Romney is telling Republican voters that Donald Trump is a “phony” who must be defeated to avoid profoundly negative consequences for the party and the country.

READ MORE: Sharon Gless On Book 'Apparently There Were Complaints: Cagney & Lacey 'Changed The History Of Television For Women'

Romney, the party’s presidential nominee four years ago, is charging into the 2016 political theatrics Thursday with a morning speech set to be delivered at the University of Utah. The Associated Press obtained excerpts of the speech.

READ MORE: Justice Department Sues Texas Over New Redistricting Maps

In his prepared remarks, the former Massachusetts governor argues that Trump’s campaign promises “are as worthless as a degree from Trump University.” He also asserts that the billionaire real estate mogul “has neither the temperament nor the judgment to be president.”

Romney’s broadside comes amid increasing restiveness within the GOP establishment over the increasing likelihood that he could soon garner sufficient delegates to clinch the party’s presidential nomination.

MORE NEWS: Mesquite Police Identify Suspect Jamie Jaramillo In Fatal Shooting Of Officer Richard Lee Houston II

(© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)