In a vote along party lines, the federal government has ended sweeping net-neutrality rules that guaranteed equal access to the internet.

The Thursday vote at the Federal Communications Commission will likely usher in big changes in how Americans use the internet, a radical departure from more than a decade of federal oversight. The move not only rolls back restrictions that keep broadband providers like Comcast, Verizon and AT&T from blocking or collecting tolls from services they don’t like, but bars states from imposing their own rules.

The broadband industry promises that the internet experience isn’t going to change, but its companies have lobbied hard to overturn these rules. Protests have erupted online and in the streets as everyday Americans worry that cable and phone companies will be able to control what they see and do online.

That growing public movement suggests that the FCC vote won’t be the end of the issue. Opponents of the move plan legal challenges, and some net-neutrality supporters hope to ride that wave of public opinion into the 2018 elections.

FCC Chairman Ajit Pai, a Republican who said his plan to repeal net neutrality will eliminate unnecessary regulation, called the internet the “greatest free-market innovation in history.” He added that it “certainly wasn’t heavy-handed government regulation” that’s been responsible for the internet’s “phenomenal” development.

“What is the FCC doing today?” he asked. “Quite simply, we are restoring the light-touch framework that has governed the internet for most of its existence.”

Under the new rules, the Comcasts and AT&Ts of the world will be free to block rival apps, slow down competing service or offer faster speeds to companies who pay up. They just have to post their policies online or tell the FCC.

The change also axes consumer protections, bars state laws that contradict the FCC’s approach, and largely transfers oversight of internet service to another agency, the Federal Trade Commission.

Commissioner Mignon Clyburn, a Democrat who was appointed by President Barack Obama, lambasted the “preordained outcome” of the vote that she says hurts people, small and large businesses, and marginalized populations. She outlined her dissent from prepared remarks before the vote.

The end of net neutrality, she said, hands over the keys to the internet to a “handful of multi-billion dollar corporations.”

With their vote, the FCC’s majority commissioners are abandoning the pledge they took to make a rapid, efficient communications service available to all people in the U.S., without discrimination, Clyburn said in her dissenting remarks before the vote.

Ajit Pai’s biggest triumph

Pai has called the complaints “hysteria” and “hot air.” In another, he dismissed criticism that by pushing the change, he was doing the bidding for companies like Verizon, his former employer. He joked that his nightmare scenario would be refereeing a dispute between Verizon and Sinclair Broadcasting, another company he has been accused of helping with his policies.

“How do you choose,” he said, “between a longtime love and a newfound crush?”

Passing the plan would be the biggest victory in Pai’s eventful 11-month tenure as the head of the FCC. Under his leadership, the agency has already opened the door for more media mergers, curtailed a high-speed internet program for low-income families and allowed broadband providers to raise rates to business customers.

All this activity has made Pai, 44, a former lawyer for Verizon and a longtime government bureaucrat, the target of many angry protests. In recent days, government officials — including 18 state attorneys generals and dozens of Democratic members of Congress — have asked the FCC to delay the vote. On Wednesday, the attorneys general said that many of the 23 million public comments that had been filed to the agency about net neutrality appeared to be fraudulent. Pai has ignored the delay requests.

But Pai’s changes have also made him a pivotal official in the Trump administration’s rush to shed regulations. The effects of his decisions have rippled across the industries Pai oversees. The looser rules on media ownership, for example, has enabled Sinclair Broadcasting’s $3.9 billion bid for Tribune.

Ajit Pai has the potential to be one of most consequential commissioners in the agency’s history,” said Gus Hurwitz, an assistant professor at the University of Nebraska College of Law, who is an expert in telecom policy and who supports Pai’s proposal.