Publix is being targeted by Mr. Hogg for its support of Adam Putnam, a Republican gubernatorial candidate who is now the state’s agricultural commissioner. The Tampa Bay Times reported earlier this week that Publix had given $670,000 during the last three years to Putnam campaigns.

Mr. Hogg not only sought atonement money from the grocery chain in Thursday’s tweet, he also demanded a pledge of ideological fealty to the gun-control movement.

“I call on @Publix to donate double the money they gave to Putman [sic] to the Stoneman Douglas Victims fund, $1,000,000. And never support an A rated NRA politician again,” he wrote.