(CNN) A major gun safety advocacy organization announced Friday it is endorsing Hillary Clinton for president.

Everytown for Gun Safety president John Feinblatt said in a statement: "Gun Sense Voters have a champion in Hillary Clinton. Our litmus test is simple: does a candidate side with the public or with the gun lobby? Hillary Clinton passes that test with flying colors -- pushing back against the NRA's extreme 'guns for everyone, everywhere' agenda, and ushering in a new political calculus that saving lives from gun violence is a winning issue."

Richard Martinez, an outreach associate with the Everytown organization in California whose son was killed in a 2014 shooting near University of California-Santa Barbara, said in the statement that he will be voting for Clinton in the critical California primary on Tuesday "because she is the only candidate who fights for gun violence survivors and stands up to the extremist gun lobby."

Everytown for Gun Safety was launched in 2014 with a $50 million pledge from former New York City Mayor Michael Bloomberg, an outspoken advocate of gun control laws, in response to the Sandy Hook shooting massacre.