A former police officer who defended the U.S. Capitol against rioters on Jan. 6 has announced he is running for Congress in Maryland. Harry Dunn wrote on X, formerly known as Twitter, that he will be running in a crowded Democratic primary to replace Rep. John Sarbanes, a Democrat who is not seeking reelection. Dunn made the announcement on Friday, a day before the third anniversary of the violent attack at the Capitol that disrupted the certification of the 2020 election. In an interview with The Associated Press, Dunn said “this moment that we are in requires everybody to step up and step into their role in defending and preserving democracy, and I’m stepping into mine right now.”