A push by Congress to reinstate recently discarded net neutrality rules is gaining momentum, with backers gaining enough support to force a vote.

Last month, the Federal Communications Commission voted to repeal 2015 rules that required internet service providers to treat all traffic equally. Backers called the rules clumsy and unnecessary, arguing the Internet had flourished without such protections.

But the vote provoked a national backlash from elected officials, technology companies and internet users worried the move would undermine an open internet by segregating it into faster and slower lanes. Almost as soon as the FCC voted, attorneys general were threatening to sue and members of Congress were vowing to reverse the regulator’s decision.

Those promises are moving closer to reality. The Congressional Review Act empowers representatives to turn back regulatory moves — and, unlike other bills that could languish indefinitely if committee chairs block them, a bill invoking the act gets referred to a floor vote if it has enough support.

Sen Ed Markey of Massachusetts announced this week his bill had cleared that threshold and then some, gaining more than 40 cosponsors. Among them was Maine Republican Susan Collins, the first GOP member to join on.

“There will be a vote on the floor of the United States Senate on net neutrality, Mr Markey said at a news conference, calling it “the foundation of both our democracy and our economy”.

Net neutrality protests – in pictures Show all 5 1 /5 Net neutrality protests – in pictures Net neutrality protests – in pictures Lindsay Chestnut of Baltimore holds a sign that reads "I like My Internet Like I Like my Country Free & Open" as she protests near the Federal Communications Commission (FCC), in Washington, Thursday, Dec. 14, 2017, where the FCC is scheduled to meet and vote on net neutrality. The vote scheduled today at the FCC, could usher in big changes in how Americans use the internet, a radical departure from more than a decade of federal oversight AP Net neutrality protests – in pictures Demonstrators rally outside the Federal Communication Commission building to protest against the end of net nutrality rules December 14, 2017 in Washington, DC. Lead by FCC Chairman Ajit Pai, the commission is expected to do away with Obama Administration rules that prevented internet service providers from creating differnt levels of service and blocking or promoting individual companies and organizations on their systems. Getty Images Net neutrality protests – in pictures Demonstrators rally outside the Federal Communication Commission building to protest against the end of net nutrality rules December 14, 2017 in Washington, DC. Lead by FCC Chairman Ajit Pai, the commission is expected to do away with Obama Administration rules that prevented internet service providers from creating differnt levels of service and blocking or promoting individual companies and organizations on their systems. Getty Images Net neutrality protests – in pictures Demonstrators rally outside the Federal Communication Commission building to protest against the end of net nutrality rules December 14, 2017 in Washington, DC. Lead by FCC Chairman Ajit Pai, the commission is expected to do away with Obama Administration rules that prevented internet service providers from creating differnt levels of service and blocking or promoting individual companies and organizations on their systems. Getty Images Net neutrality protests – in pictures Demonstrators rally outside the Federal Communication Commission building to protest against the end of net nutrality rules December 14, 2017 in Washington, DC. Lead by FCC Chairman Ajit Pai, the commission is expected to do away with Obama Administration rules that prevented internet service providers from creating differnt levels of service and blocking or promoting individual companies and organizations on their systems. Getty Images

“There will be a political price to pay for those who are on the wrong side of history,” he added, noting that that the issue galvanizes millennial voters.

Despite that progress towards overruling the FCC, supporters still face an uphill fight. While some Republicans have said Congress should decide the matter rather than deferring to regulators, the argument for repealing net neutrality is essentially a conservative economic one: less regulation means more innovation and cost-savings that companies will invest in new infrastructure or pass on to customers.