A sign held by protestors at the “March for Our Lives” gun control demonstration in Washington, D.C. Saturday mocks Sen. Marco Rubio’s (R., Fla.) faith and refers to him as a “kid killer.”

The sign, spotted by the Washington Free Beacon’s Stephen Gutowski, was reflective of the collective animosity protesters directed at Rubio.

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Several Parkland survivors attended the march wearing tags reading $1.05, a figure Parkland student Sarah Chadwick reached by dividing the National Rifle Association (NRA) contributions Rubio has received by the number of high school students enrolled in Florida.

David Hogg, a seventeen-year old Parkland student and committed gun control activist, attached one of the tags to the microphone before delivering a speech during the protest.

“I’m going to start off by putting this price tag right here as a reminder for you guys to know how much Marco Rubio took for every student’s life in Florida,” Hogg said before a crowd of tens of thousands gathered in front of the Capitol building.

Rubio responded to the personal attacks by calling for compromise Saturday on Twitter.