Michael Reagan, son of former President Ronald Reagan, addresses about 400 people at a Tea Party rally on April 13, 2010. | AP Photo Reagan's son: My dad 'likely' wouldn't support Trump

Michael Reagan — the son of former president and Republican icon Ronald Reagan — said he would not be voting for Donald Trump during California's GOP primary on Tuesday. And his late father probably wouldn't, either.

“I will not be Voting for Trump tomorrow in the Calif.Primary,” Reagan tweeted Monday at Republican National Committee Chairman Reince Priebus.

Advertisement I will not be Voting for Trump tomorrow in the Calif.Primary.. — Michael Reagan (@ReaganWorld) June 6, 2016

He later added that the 2016 election campaign “most likely would be the 1st time if my father was alive that he would not support the nominee of the GOP.”

The comments continue a long string of criticisms of Trump from Reagan, who on Jan. 29 told NewsMax that his father would be "absolutely appalled" if Trump were the Republican Party's nominee.

Both Michael Reagan, a conservative political strategist who previously hosted a talk radio program for decades, and his brother Ron Reagan dismissed comparisons between Trump their father in an interview with POLITICO Magazine on Sept. 16, 2015, taking particular aim at the real estate mogul's plan to deport undocumented immigrants.

“Ronald Reagan would never take 11 million people or three million people or a million people and throw them out of the United States of America,” Michael Reagan told POLITICO.

He also told CNN in a Sept. 12, 2015, interview that Trump was the least “Reaganesque” candidate in the GOP presidential field at the time, contrasting his attacks on fellow candidates with how his father “brought everybody together."

"Ronald Reagan didn't attack the people around him. He didn't demean the people around him. You know, he brought everybody together," Reagan said.

Trump has come under fire for openly mocking the now-deceased Nancy Reagan, the wife of Ronald and step-mother of Michael and mother of Ron, in a 2004 interview during which he said she was “never very beautiful.”

Trump has also been criticized for his past comments about the late president, whom he attacked in full-page ads in various newspapers in 1987.

Last week, San Diego's Union-Tribune newspaper urged its readers to reject Trump and write-in Ronald Reagan, who was governor of California from 1967 to 1975, instead.