Since the February 14 mass shooting that killed 17 people at the high school, Hogg, 17, has emerged as one of the school's most high-profile advocate for gun control measures.
A Richmond Heights Democrat and a longtime supporter of stronger gun laws, Rep. Stacey Newman, criticized Allman for his actions and said he crossed a line.
Hogg is the Parkland High School student who has been making the media rounds since the mass shooting there, spreading an anti-gun violence message. We have the screenshots and believe us, they are cruel and obscene.
At least three of Allman's sponsors publicly announced they were abandoning his shows, including Ruth's Chris Steak House, a local real estate firm, and a health and wellness center in St. Louis.
Last month, Fox News host Laura Ingraham lost a number of her advertisers after she mocked Hogg after he failed to get into several universities.
Other than a few quick jests with fellow Fox talk-show host Sean Hannity, Ingraham did not tackle the Parkland controversy.
She later apologized after Hogg urged his 700,000-plus Twitter followers to pressure companies to stop advertising on Ingraham's show.
During the opening monologue of her return episode, Ingraham took aim at what she called "bullies" on the left who "silence" conservative voices, and condemning the FBI's raid of President Trump's personal attorney Michael Cohen's office. The context of the tweet wasn't clear.
"He says you shouldn't have the right to have a certain kind of gun but I should have the right to have any kind of backpack I want", Allman said incredulously during one segment.
Hogg has told CNN and other media outlets that he is interested in pursuing a career in journalism or filmmaking.
During Monday morning's radio show Allman didn't mention the controversy or the boycott, Mediaite reported.