Today on Capitol Hill, Democratic lawmakers are continuing a historic sit-in on the floor of the House to demand a vote on gun control after the Orlando massacre left 49 people dead. Democrats are pushing for votes to expand background checks for gun purchases and to curb the sale of weapons to people on government watchlists—a proposal strongly opposed by the American Civil Liberties Union and the Center for Constitutional Rights, among other groups. The sit-in was initiated by Congressmember John Lewis, a veteran of the civil rights movement. We’ll go to Washington, D.C., after headlines.