Elaine Kamarck, a fellow at the left-leaning Brookings Institution, said Friday that Democrats will have a better chance of winning the Senate majority in 2020.

"We always knew that it was hard [for Democrats] to take the Senate, mostly because of the seats that [were] up," Kamarck, who is also the director of the Center for Effective Public Management, told Hill.TV's Jamal Simmons on "What America's Thinking."

"That will not be the case in 2020. There are more Republican seats up. There's the excitement of a presidential [race], and we've got a big age gap in the electorate these days. The more young people vote, the more Democratic outcomes are, and we're going to see that, I think, in 2020," she continued.

"So Democrats have a lot to look forward to," she added.

Kamarck's comments come as new polling shows Democrats feeling increasingly optimistic about their future after their midterm victories.

A new American Barometer survey found that 53 percent of Democrats polled said they felt "more optimistic" about the direction of the country, while 13 percent said they felt "more pessimistic," and 34 percent answered "about the same as before."

Still, winning back the Senate won't be easy for the party.

If Gov. Rick Scott (R-Fla.) holds his lead in Florida and defeats Sen. Bill Nelson Clarence (Bill) William NelsonDemocrats sound alarm on possible election chaos Trump, facing trouble in Florida, goes all in NASA names DC headquarters after agency's first Black female engineer Mary W. Jackson MORE, Republicans are likely to have a 53-47 edge in this year's Senate.

In 2020, the best Democratic chances for gains are in Maine and Colorado, which are the only states won by Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE in the last presidential race that have GOP incumbents up for reelection.

Democrats will also be defending Sen. Doug Jones's seat in Alabama, which could be tough to hold.

Other possible targets for Democrats in 2020 include Sens. Joni Ernst Joni Kay ErnstThe 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 Romney backs pre-election Supreme Court vote, paving way for McConnell, Trump MORE (R-Iowa), Thom Tillis Thomas (Thom) Roland TillisThe Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting OVERNIGHT ENERGY: EPA head questions connection of climate change to natural disasters | Pebble Mine executives eye future expansion in recorded conversations | EPA questions science linking widely used pesticide to brain damage in children Liberal super PAC launches ads targeting vulnerable GOP senators over SCOTUS fight MORE (R-N.C.) and David Perdue (R-Ga.).

— Julia Manchester