A leaked memo by the National Republican Senatorial Committee argued earlier this week that GOP presidential front-runner Donald Trump should be emulated instead of condemned, but one billionaire donor isn’t taking that route.

Mike Fernandez, a Miami health care magnate and Jeb Bush donor, ran a full-page ad in McClatchy’s Miami Herald Sunday and will run the same ad on Dec. 14 in Des Moines and Las Vegas slamming Trump and calling on voters to “'see the "hater' for what he is-- insecure, narcissistic BULLYionaire with a hunger to be adored.”

Fox News exclusively obtained the ad late Saturday in which Fernandez likens Trump to “despotic leaders" like Mussolini, Hitler and Peron.

"Mr. Trump portrays himself as someone who can do no wrong, unblemished by almost any human faults--indeed, the paragon of smarted and greatest. But his worst and actions tells who is who he really is-- a destroyer,” Fernandez adds.

Fernandez, a noted Bush donor, didn’t mention him in the ad or any other candidate from either side of the aisle. Fernandez told the Miami Herald Friday he didn’t run his plan by the Bush campaign, but heard an earful when they learned of his plan.

Fernandez is the founder of MBF Healthcare Partners. He immigrated from Cuba in 1964 when he was 12. He donated $3 million to the former Florida governor earlier this year.

"In my home, my county, I cannot stand by and accept demagoguery that would separate us-rich vs. poor, minority vs. Majority, red vs. Blue. Our nation stands today more divided than ever,” Fernandez says.

"Surely, we are better people than to agree with this man's sound bites and raucous rallies and think the worst in U.S. is right for this country."

Fox News’ Serafin Gomez contributed to this report.