House Speaker Nancy Pelosi narrowly secured passage of her signature election-overhaul legislation Wednesday without a single Republican vote, sending the heated debate over how America votes to the Senate where the bill is all-but doomed.

The proposal, which is known as H.R. 1, passed on a 220-210 vote almost entirely along party lines. Although one Democrat voted against the bill, the vote was otherwise entirely partisan, underscoring the gap between the two parties on election laws.

“Everything is at stake,” Mrs. Pelosi, California Democrat, said at a press conference ahead of the vote. “Across the country over 200 bills are being put together, provisions are put forth [by Republicans] to suppress the vote.”

“What we are doing in this fight that we are engaged in is to empower the people,” she said.

Initially, the measure was heralded by House Democrats as expanding voting rights. They argued that the legislation, titled the “For the People Act,” would curb the influence of money in politics, prevent foreign interference in campaigns and stymie voter suppression.

Republicans have pointed to the bevy of liberal provisions in the 791-page bill and decried it as a partisan effort intended only to benefit Democratic candidates. They also have balked at the bill for guaranteeing voting rights for all felons, granting statehood to the District of Columbia and providing public financing of campaigns.

Despite House passage, the bill faces an even steeper climb in the Senate, where it will need at least 10 Republican votes to survive an expected filibuster. That number of Republican defections is unfathomable given the united opposition among Republicans in the House.