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ST. LOUIS — A conservative commentator who sent a tweet saying he would use “a hot poker” to sexually assault an outspoken 17-year-old survivor of the Parkland, Fla., school shooting has resigned from a St. Louis TV station.

KDNL-TV accepted Jamie Allman’s resignation and canceled “The Allman Report,” according to a brief statement from Ronn Torossian, a spokesman for the Sinclair Broadcast Group, which operates the TV station. Before the show’s launch in January 2015, KDNL-TV touted it as a nontraditional newscast with a conservative spin.

Allman has been critical of David Hogg, 17, and other Parkland survivors who are advocating for tougher gun control after a gunman murdered 17 people at Marjory Stoneman Douglas High School in February.

Allman took to Twitter on March 26 to boast he was planning to assault the teen with a fireplace implement, according to CNN affiliates who captured a screenshot of the post. The screenshot has been widely circulated on social media.

“When we kick their a– they all like to claim we’re drunk,” Allman wrote, according to CNN. “I’ve been hanging out getting ready to ram a hot poker up David Hogg’s a– tomorrow. Busy working. Preparing.”

Allman has since made his Twitter account private.

Allman’s accompanying radio show on KFTK-FM has been taken off the air while the company “looks into the matter,” said Esther-Mireya Tejeda, a spokeswoman for Entercom, which began operating the station last month. Several advertisers withdrew from Allman’s shows following the tweet.

Allman hasn’t responded to messages seeking comment.

Hogg’s willingness to take on the gun-control cause has made him a target for some conservatives. Fox News Channel’s Laura Ingraham took a week’s leave after apologizing via social media for her tweet that Hogg had “whined” about not getting in to some colleges.

Ingraham hasn’t discussed that episode specifically but promised upcoming stories about conservatives who she says are fighting attempts to silence them. Hogg, meanwhile, said it’s “time to love thy neighbor, not mudsling at children.” Their social media spat came to symbolize the debate over how youthful advocates for gun safety should be treated by political opponents. Another student, Emma Gonzalez, has been falsely depicted in a doctored photo tearing up the Constitution.

In Missouri, state Rep. Stacey Newman, a Democrat from Richmond Heights, led calls for a boycott by Allman’s sponsors after he sent his tweet.

“We’ve had people all over Missouri (and) all over the country weighing in on this … it’s heartwarming to know that tons of people throughout the state understand this is not acceptable,” Newman told the St. Louis Post-Dispatch on Monday. “Even though we hadn’t asked for his removal or resignation, (Sinclair) took it upon themselves. People know where the line is.”

Sinclair is a conservative-leaning company that owns nearly 200 local TV stations, making it one of the largest such companies in the U.S.

President Donald Trump last week defended the company after a video showing dozens of Sinclair news anchors reading a script expressing concern about “fake stories” and “one-sided news stories plaguing the country” appeared on TV news reports and circulated online. Trump said rival TV stations were merely “worried about the competition and quality of Sinclair Broadcast.”

Sinclair also has pushed for regulation of the broadcast industry to be eased and is trying to buy Tribune Media in a move that would dramatically increase the company’s reach.

Allman also served a six-month stint in 2004 and 2005 as chief spokesman for then-St. Louis Archbishop Raymond Burke and executive director of communications for the archdiocese. Archdiocese spokesman Gabe Jones didn’t immediately respond to a phone call and email message seeking comment.