Encouraged by the results from last week's elections, Deputy Democratic National Committee Chairman Keith Ellison predicted the party will win back both the House and Senate in 2018.
Ellison's comments came in an interview with The Atlantic.
"We're going to take the House and we're going to take the Senate," the Minnesota congressman said.
"If we make people feel that we've got their back, and their party is there for them, the election becomes the easy part.
"If you look at the mission statement of the DNC prior to now, it would say our goal is to elect the president. Now our goal has changed. Our goal is to elect Democrats from dog-catcher to president and everywhere in between, and our primary tool is grassroots engagement."
The interview with The Atlantic was conducted shortly before Alabama Republican Senate candidate Roy Moore was the subject of allegations of sexual misconduct, the magazine said.
But even then, Ellison was confident about Democrat Doug Jones.
"Alabama is a blue state in the making," he said. "It's full of folks who want a better life, who want higher pay."
Ellison said Democrats have an opportunity to take advantage of the current political climate.
"Look, I just hope that everybody understands that we have a chance to win back the confidence of the American people," he said. " I hope we take that chance."
And he said: "If you look at the mission statement of the DNC prior to now, it would say our goal is to elect the president. Now our goal has changed. Our goal is to elect Democrats from dog-catcher to president and everywhere in between, and our primary tool is grassroots engagement."
Meanwhile, DNC Chairman Tom Perez also expressed optimism as a result of last week's election, according to NPR.
"Well, I think when we're united, that's our greatest strength," he said.