Top Democrats expressed confidence Sunday that Congress will pass significant gun-control legislation, with the backing of Washington lawmakers and pressure from Americans across the country.

David Plouffe, a senior adviser for President Obama, acknowledged the president’s gun-control proposals will need public support to pass in Congress and said the White House will try to “enlist” Americans in the debate through its newly formed, grassroots advocacy group.

“We are trying to enlist the American people in these debates,” Plouffe said on CNN’s “State of the Union,” “The only way change is going to really happen and make progress is with the American people. … They need to be involved at the center of this and pushing here.”