Connecticut Sen. Chris Murphy Christopher (Chris) Scott MurphyDemocratic senator calls for 'more flexible' medical supply chain to counter pandemics The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon GOP chairman to release interim report on Biden probe 'in about a week' MORE (D) said Wednesday he feels “awful” Congress hasn’t enacted more significant gun laws in the five years since a mass shooting in his home state at Sandy Hook Elementary.

“I’m always a little embarrassed when I go back to Newtown,” Murphy told The Guardian. “I still feel awful that we haven’t enacted bigger national change.”

Thursday marks the five-year anniversary of the Sandy Hook shooting, which left 26 people, including 20 children, dead.

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Since the shooting, Murphy has been an outspoken advocate for stricter gun laws.

He introduced bipartisan legislation last month to strengthen the national background check system in the wake of a mass shooting at a church in Sutherland Springs, Texas.

The measure is co-sponsored by Sens. John Cornyn John CornynThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight Senate GOP faces pivotal moment on pick for Supreme Court MORE (R-Texas), Tim Scott Timothy (Tim) Eugene ScottAuthor Ryan Girdusky: RNC worked best when highlighting 'regular people' as opposed to 'standard Republicans' Now is the time to renew our focus on students and their futures GOP lobbyists pleasantly surprised by Republican convention MORE (R-S.C.) and Richard Blumenthal (D-Conn).

Murphy will meet with some of the families of the Sandy Hook victims on Thursday at a remembrance event at a local church, The Guardian reported.

“Obviously, five years is a milestone, and I think it’s important that there’s some event in the community to remember what happened and to celebrate the lives we lost, but also the lives that have continued,” he said.