If one only more GOP senator flips, the FCC's Net Neutrality order will be up for grabs

So, what does the CRA actually do? Does it create a process for regulatory review? Or is it specific to net neutrality?

Because, Congress created the FCC and delegated rulemaking power to it. A Congress can’t tie it’s successors’ hands, so of course it has the authority to take that power back. Why do they wajn or need the CRA?