Gun-regulation activists went to Rep.
Courage Campaign, a Los Angeles-based group that organized the effort, said it was calling on Rohrabacher (R-Costa Mesa) to take action on gun safety legislation.
Along with the flowers, the group said it left a message for the congressman reading, "We stand with Las Vegas and all of the lives that our country's reckless gun laws endanger. Your lack of action has and will continue to kill innocent people."
Rohrabacher's office did not immediately respond to a request for comment Tuesday.