ST. LOUIS -- A conservative commentator who sent a violent and vulgar tweet saying he would use "a hot poker" to sexually assault a 17-year-old survivor of a Florida high school shooting has resigned from a St. Louis TV station after several advertisers withdrew from his show. KDNL-TV has canceled "The Allman Report" and accepted Jamie Allman's resignation, according to a brief statement from Ronn Torossian, a spokesman for the Sinclair Broadcast Group, which operates the TV station.

"His show is canceled and he is off the air immediately," Torossian said in the statement, according to CBS St. Louis affiliate KMOV-TV.

Before the show's launch in January 2015, KDNL-TV touted it as a nontraditional newscast with a conservative spin.

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Allman's also off the radio airwaves. Entercom spokeswoman Esther-Mireya Tejeda said Tuesday that his show on KFTK-FM has been taken off the air while the company "looks into the matter." Entercom has been operating KFTK-FM since last month. The station previously was owned by Emmis Communications.

Allman was absent Monday from his radio show. He hasn't responded to messages from the Associated Press seeking comment.

Several businesses pulled advertising from Allman's shows after he sent the March 26 tweet targeting David Hogg. Allman's Twitter account was "locked" shortly after he sent the tweet, restricting access to his account, but a screenshot of it has been widely circulated on social media.

Hogg has strongly advocated for stricter gun control since 17 people were killed in the Feb. 14 mass shooting at his school in Parkland, Florida.

The teenager's willingness to take on the cause has made him a target for some conservatives.

Fox News Channel's Laura Ingraham tweeted Hogg had whined about not getting in to some colleges he had applied for.

David Hogg Rejected By Four Colleges To Which He Applied and whines about it. (Dinged by UCLA with a 4.1 GPA...totally predictable given acceptance rates.) https://t.co/wflA4hWHXY — Laura Ingraham (@IngrahamAngle) March 28, 2018

Hogg responded by suggesting that people offended by Ingraham's remark contact her advertisers.

Soooo @IngrahamAngle what are your biggest advertisers ... Asking for a friend. #BoycottIngramAdverts — David Hogg (@davidhogg111) March 29, 2018

Some 19 companies responded by saying they wouldn't air commercials on Ingraham's show.

Ingraham was on vacation for a week after apologizing via social media for her tweet.

Any student should be proud of a 4.2 GPA —incl. @DavidHogg111. On reflection, in the spirit of Holy Week, I apologize for any upset or hurt my tweet caused him or any of the brave victims of Parkland. For the record, I believe my show was the first to feature David...(1/2) — Laura Ingraham (@IngrahamAngle) March 29, 2018

She returned to work with defiance Monday. She 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."

I 100% agree an apology in an effort just to save your advertisers is not enough. I will only accept your apology only if you denounce the way your network has treated my friends and I️ in this fight. It’s time to love thy neighbor, not mudsling at children. https://t.co/H0yWs4zMGk — David Hogg (@davidhogg111) March 29, 2018

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.

State Rep. Stacey Newman, D-Richmond Heights, led calls for a boycott by Allman's sponsors after the 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 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. Mr. Trump said rival TV stations were merely "worried about the competition and quality of Sinclair Broadcast."

The Fake News Networks, those that knowingly have a sick and biased AGENDA, are worried about the competition and quality of Sinclair Broadcast. The “Fakers” at CNN, NBC, ABC & CBS have done so much dishonest reporting that they should only be allowed to get awards for fiction! — Donald J. Trump (@realDonaldTrump) April 3, 2018

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.