U.S. Rep. Raúl M. Grijalva said Monday that the nation cannot stop at grieving for the victims of the Newtown, Conn., school shooting and must move to act on stricter gun control laws.

In a statement released by his office, the Democratic congressman from Tucson said, “We have become a nation overly acquainted with shock and grief," and the time for a dialogue about gun violence has passed.

“At some point, which I believe we long ago passed, the time comes to stop calling for ‘a national dialogue’ when one side is clearly uninterested in talking," Grijalva's statement said. "Absolutism in defense of gun violence is no virtue, and we have been cowed by absolutists for too long."

He called the availability of high-powered weapons "scandalous."

“If pro-gun activists will not negotiate in good faith, it is time for the country to move on without them, Grijalva said. "Sitting on our hands and hoping for the best is no longer an option."