A law that’s been successfully used only once until now is the conduit for a whole lot of action on Capitol Hill.

Republicans in Congress are expected to send a stream of bills — most of which require a single sentence — to President Donald Trump’s desk, using a process known as the Congressional Review Act to repeal agency rules. The act was tucked into 1996 legislation tied to former House Speaker Newt Gingrich’s famous “Contract with America.”

Senate Majority Leader Mitch McConnell, at a press conference last week, joined a group of Republican leaders who have trumpeted using the CRA to roll back regulations put in place under President Barack Obama. The law allows Congress to repeal certain rules of the previous administration under a fast-track process that requires only a simple majority in the Senate. Congress generally has 60 days to begin repeal of those rules.

“We’re directly attacking the over-regulation issue, thanks to the Congressional Review Act, and plan to take as many of these job-killing regulations off the books as possible,” McConnell said. Earlier this month, the Kentucky Republican pointed to “nearly 40” major rules put out by the Obama administration “on its way out the door” that he said Congress could work with Trump to undo.

“This is probably the most underreported story in Washington today,” Pennsylvania GOP Rep. Glenn Thompson said at a press conference on Feb. 16, referring to the Republicans’ use of the CRA.