As a candidate, President-elect Donald Trump railed against the political money system, saying it offers big donors outsized clout. But the changes he is likely to enable would roll back campaign finance regulations, allowing contributors to give even more.

The Republican’s victory in the presidential contest has given new hope to opponents of current donation limits and other restrictions, while it has jolted fear into those who want to overhaul political money laws to put ordinary Americans on more equal footing with megadonors.

“You can expect the Republicans to be very aggressive in lifting a lot of the regulations that are currently not only on political parties but on the system generally,” said James Bopp Jr., an attorney who supports campaign finance deregulation. “Everybody agrees the system is dysfunctional, but that is caused by the legal restrictions.”

Voters not only picked Trump, but they also kept the Senate in GOP hands. The majority leader, Mitch McConnell of Kentucky, is an advocate for campaign finance deregulation and for relaxing coordination rules between party committees and their candidates.

McConnell led the mostly unsuccessful legal challenge to the 2002 McCain-Feingold overhaul, which banned so-called soft money from corporations to political parties. But McConnell, whose office declined to comment, may now be poised to win. (The law is named for its Senate champions, Republican John McCain of Arizona and Russ Feingold, then a Democratic senator from Wisconsin.)