Democrats are projected to keep control of the U.S. House in Tuesday’s elections, but with at least six incumbents losing their seats the party is falling far short of pre-election expectations of an expanded majority.

Among the Democrats defeated were several first elected in the 2018 “blue wave” that swept them into majority, as well as with House Agriculture Chairman Collin Peterson, who has represented his Minnesota district since 1991. While Republicans aren’t threatening to take back control of the House, House Speaker Nancy Pelosi will have less room to maneuver.

With Democrats also on the verge of failing in their quest for a Senate majority and the presidential race too close to call, House Democrats might have to shelve their most ambitious plans for health care, fighting climate change and responding to the coronavirus epidemic.

“It’s not over until every vote is counted,” Pelosi told supporters, pointing to races in her home state of California and elsewhere in the western U.S. that haven’t yet been called.

In addition, Pelosi will be facing more pressure from the left. New York Representative Alexandria Ocasio-Cortez easily won re-election and will be joined by several more self-described progressive members, including Jamaal Bowman, Mondaire Jones and Ritchie Torres in New York, and Missouri’s Cori Bush, who are replacing more centrist Democrats.

Democrats took over the House after they netted 41 seats in the 2018 midterms, the largest single-year pick-up since the post-Watergate midterm elections in 1974. The 435-seat chamber currently has 232 Democrats, 197 Republicans, one Libertarian and five vacancies. Independent analysts forecast heading into Tuesday’s vote that Democrats would gain 10-15 seats. Instead they may face a net loss.

In Florida, Democratic Representative Debbie Mucarsel-Powell was defeated by Republican Carlos Gimenez, the mayor of Miami-Dade County. Democrat Donna Shalala, former Health and Human Services secretary, lost to Republican Maria Elvira Salazar, a broadcast journalist.

Three other first-term Democrats lost on Tuesday as well. Oklahoma Democratic Representative Kendra Horn conceded in her contest against Stephanie Bice, though the race had not been officially called. And South Carolina Democrat Joe Cunningham lost Republican challenger Nancy Mace. New Mexico’s Xochitl Torres Small lost to Republican Yvette Herrell.

Democrats picked up two formerly GOP-held seats that had been redistricted in North Carolina.

Part of House Democrats’ pre-election optimism came from the number of GOP retirements and the defeat of some Republican incumbents in primaries.

But Republicans held the seat opened up by the retirement of GOP Representative Francis Rooney in Florida. The winner of that contest, Byron Donalds, will be the only Black Republican in the House. Another open race in Texas for a Waco-area seat now held by retiring Republican Bill Flores was won by former House Rules Committee Chairman Pete Sessions, who had been defeated in his former Dallas area district in 2018.

Pelosi, the only woman ever to hold the speaker’s gavel, has already said she plans to run for re-election as speaker in the next Congress. House Democrats return on Nov. 18 and 19 to Washington, along with their members-elect, to elect their leaders for the new session in January. That includes nominating a speaker who must then be elected by the full House of Representatives.