The Federal Communications Commission is working toward officially taking current net neutrality rules off the books.
The agency took the requisite formal step of publishing the rules on Thursday, opening the door for lawsuits from a number of state attorneys general and advocacy groups.
Senate Democrats have also been pushing for a special congressional vote to block regulations from going into effect, but have so far been one vote short of overcoming the Republican majority. A similar vote would also face a very high hurdle in the Republican-controlled House of Representatives.
The pushback follows the December vote by the Republican-led FCC to repeal Obama-era net neutrality rules, which limit the power of internet service providers to influence loading speeds for specific websites or apps. The repeal can't take effect until the Office of Management and Budget completes a review of the change.