Marshalltown Mayor Joel Greer is one of three mayors in Iowa to support a gun-control initiative by the group March For Our Lives. The organization is working to get young voters to register to vote with the ultimate objective to help pass tougher gun laws.

Greer says he also supports the movement’s goal of curbing gun violence through legislative change.

In addition to Greer, Iowa mayors in Mt. Vernon and Keosauqua have signed the pledge so far. Millennials have the lowest voter turnout of any age group, with only about 46-percent casting ballots in the last presidential election.