Colin Kaepernick, the former NFL quarterback turned social justice activist, appeared to criticize House Speaker Kevin McCarthy on Thursday when he quoted and tweeted California Gov. Gavin Newsom.

Newsom and McCarthy, R-Calif., traded barbs on Twitter about crime in the Golden State. Newsom tweeted that he would propose a 28th Amendment to the United States Constitution in hopes of ridding the country of gun violence.

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House Speaker Kevin McCarthy speaks to reporters just after Republicans approved a sweeping debt ceiling package, on Capitol Hill, April 26, 2023. (AP Photo/J. Scott Applewhite)

McCarthy weighed in, writing that there was no need for the amendment when the Second Amendment already exists.

To that, the Democratic governor wrote: «What we need is for you to acknowledge the fact that you represent a district with the highest murder rate in our state, and you are doing nothing to address it.»

California Democratic Governor Gavin Newsom

Governor Gavin Newsom addresses a press conference in Half Moon Bay, California on January 24, 2023. (Dai Sugano/MediaNews Group/East Bay Times via Getty Images)

That’s when the former San Francisco 49ers quarterback stepped in.

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«#KillingCounty,» he wrote in reference to his television series examining controversial so-called deaths involving Kern County police.

McCarthy District covers parts of Kern, Tulare, Kings, and Fresno counties in California. McCarthy is a Bakersfield native and part of the documentary touches on the Bakersfield Police Department.

Kaepernick has been more active in the social justice sphere since leaving the 49ers after the 2016 season. Last month, he criticized the NFL for the league’s social justice initiatives since he’s been off the field.

Colin Kaepernick in February 2023

ABC News Studios hosts a screening event for Executive Producer Colin Kaepernick’s «Killing County» in Burbank, California on February 9, 2023. (Phil McCarten/ABC via Getty Images)

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«I haven’t seen any substantial change,» Kaepernick said. «I think there’s a lot of work to be done on that front. Obviously not playing and being out of the NFL for six years is an indictment of where they are right now. So I wouldn’t put them at the forefront of goodwill.» and the best intentions in the way they operate.»