A U.S. Supreme Court ruling that struck down the overall cap on federal election contributions is sending ripples across American politics, as states have begun backing away from their own restrictions on donations and lawyers are forecasting a new wave of challenges to campaign finance laws nationwide.

The court's 5-4 ruling on Wednesday was unsettling for many Washington fundraisers, donors and lobbyists who were comfortable with federal rules that had limited total donations to candidates and party groups to $123,200 in the 2014 election cycle.

Now, thanks to the court's decision in McCutcheon v. Federal Election Commission, donors who are able to give millions of dollars to candidates and their parties will see their influence expanded — much as it was by a 2010 ruling that inspired the creation of independent super PACs and other groups that could receive unlimited donations.