In the wake of a wave of mass shootings, the mayor of a Northern California town ordered all his city’s flags to fly at half-staff until Congress acts to stop gun violence.

San Rafael Mayor Gary Phillips made the announcement at a Monday City Council meeting, saying he’s “had it simply lowering the flag” for a few days at President Donald Trump’s request after deadly shootings.

“San Rafael will not wait any longer to express our impatience with those in Congress to take steps to address this issue on behalf of everyone,” said Phillips, who since 2011 has served as mayor of the nearly 60,000-person city.

“For me this progress is made when Congress takes specific action to address the issue,” he continued. “I am not prescribing that action, as that is their job, but I am saying that to do nothing is not acceptable to San Rafael.”

Congress hasn’t acted on gun control legislation in more than two decades. It has taken steps, however, to curtail the Centers for Disease Control and Prevention from studying gun violence.