The following opinion piece was published in the Deseret News on Sunday, March 5 -- days following Mitt Romney's speech about .the threat posed by Donald Trump.

Four men remain in contention to be the next presidential nominee of the Republican Party. Last Thursday, 2012 standard-bearer Mitt Romney said that one of these men was not like the other.

Call it an unendorsement speech.

At least it also was a recognition that of the other three candidates — Sen. Ted Cruz, Gov. John Kasich and Sen. Marco Rubio — each has something of compelling case for their party's nomination. "One of these men should be our nominee," Romney said.

Romney's substantive and serious argument was "an extraordinary public rebuke" of the party's front-runner, said the New York Times.

Romney used logic and reason to emphasize the devastating costs that would follow from trade wars, and impulsive and rash foreign policy positions.

And he laid out the path that Republicans must take as they approach their July convention in Cleveland: "If we Republicans choose Donald Trump as our nominee, the prospects for a safe and prosperous future are greatly diminished."