Sen. Bernie Sanders said he was “sickened” by the carnage wrought by a gunman who opened fire on GOP lawmakers at a congressional baseball practice early Wednesday, as he confirmed the shooter “apparently volunteered” on his presidential campaign.

Gunman James T. Hodgkinson had volunteered on Sanders’ 2016 presidential bid, according to Sanders.

“I am sickened by this despicable act. Let me be as clear as I can be. Violence of any kind is unacceptable in our society and I condemn this action in the strongest possible terms. Real change can only come about through nonviolent action, and anything else runs against our most deeply held American values,” Sanders said in a statement.

House Majority Whip Steven Scalise was among the five injured in the 7:09 a.m. shooting rampage.

“My hopes and prayers are that Representative Scalise, congressional staff and Capitol Police Officers who were wounded make a quick and full recovery. I also want to thank the Capitol Police for their heroic actions to prevent further harm,” Sanders said.

Hodgkinson, who was shot by police and later died from his injuries, has a Facebook page with several photos of Sanders.

On March 22, Hodgkinson wrote in a post, “Trump is a Traitor. Trump Has Destroyed Our Democracy. It’s Time to Destroy Trump & Co.” and linked to a petition calling for the removal of President Trump.