Stay tuned for live quotes from Mitt Romney's Thursday speech.
Romney's speech is scheduled to begin at 11:30 a.m. Eastern.
Jason Perry, director of the University of Utah's Hinckley Institute of Politics delivered introductory remarks.
Romney: "I'm not here to announce my candidacy for office and I'm not going to endorse a candidate today."
Romney: "I believe with all my heart and soul that we face another time of choosing. One that will have profound consequences for the Republican party."
Romney: "We live in troubled and dangerous times."
Romney: Trump's proposed economic policies would hurt America.
Romney: "What little (Trump) has said is enough to know that he would be bad for American workers and American families."
Romney: Trump is not a huge business success and doesn't know what he's talking about.
Romney: "He inherited his businesses, he didn't create them."
Romney: "The only serious policy proposals ... come from Ted Cruz, Marco Rubio and John Kasich. One of these men should be our nominee."
Romney: "The rules of political history have pretty much all been shredded in this campaign."
Romney: "Trump's bombast is already alarming our allies ... Insulting all Muslims will keep them from engaging with us in the war against ISIS."
Romney: Trump's idea of letting ISIS take out Assad is the "worst and most dangerous idea" presented during this campaign.
Romney: "I believe when it comes to foreign policy (Trump) is very very not smart."
Romney: "Dishonesty is Donald Trump's hallmark."
Romney: "He said he saw thousands of Muslims in New Jersey celebrating 9/11. Wrong. He saw no such thing."
Romney: "Think of ... the bullying, the greed, the misogyny, the absurd third-grade theatrics."
Romney: "Watch how he responds to my speech today..."
Romney: "Will he talk about our policy differences or will he attack me with every possible low-road insult?"
Romney: (On Hillary Clinton) "A person that untrustworthy ... must not be allowed to become president."
Romney: "There's plenty of evidence that Mr. Trump is a con man, a fake."
Romney: "I predict there are more bombshells in (Trump's) tax returns."
Romney: "It's entirely in (Trump's) hands to prove me wrong."
Romney: "I understand the anger Americans feel today."
Romney: "(Trump's message) is the very brand of anger that has sent other governments into the abyss."
Romney: "His domestic policies would lead to recession."
Romney's speech ended at 11:51 a.m. Eastern.