His latest incendiary comment, about one of the Fox News moderators from Thursday's Republican presidential debate, has led to a scolding by the party and condemnation by organizers of the RedState Gathering.
Trump's absence from Saturday's program threatened to overshadow appearances by a number of his rivals, including former Arkansas Gov. Mike Huckabee, Sen. Ted Cruz of Texas, former Florida Gov. Jeb Bush and Wisconsin Gov. Scott Walker.
The billionaire businessman lashed out against Fox News' Megyn Kelly for her questions during the campaign's first debate. She had asked the candidate about his use of derogatory language toward women and whether it reflected the "temperament of a man we should elect as president."
"I just don't want someone on stage who gets a hostile question from a lady and his first inclination is to imply it was hormonal. It just was wrong," Erickson wrote on the RedState website.
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He said that "while Mr. Trump resonates with a lot of people with his bluntness, including me to a degree, there are just real lines of decency a person running for president should not cross."
"This is just another example of weakness through being politically correct. For all of the people who were looking forward to Mr. Trump coming, we will miss you. Blame Erick Erickson, your weak and pathetic leader," according to a campaign statement.