Cam is among the nearly 200 artists and music industry executives who have signed Billboard’s open letter to Congress asking for more to be done to stop gun violence. Written in the wake of the recent tragedies in Orlando, the letter calls on Congress to pass legislation that will require a background check for every gun sale and block suspected terrorists from buying guns. The letter also includes signatures from the Dixie Chicks and Rosanne Cash, as well as Big Machine Label Group President Scott Borchetta and Warner Music Nashville CEO John Esposito. The full letter can be seen here.

Some of the other artists who’ve signed the letter are Paul McCartney, Katy Perry, Cyndi Lauper, Cher, Britney Spears and many more.