HARRISBURG — A U.S. Supreme Court decision giving corporations and unions more leeway in spending money on campaigns for the president and Congress may have an impact on Pennsylvania elections, too.

The nation's highest court ruled Thursday in a 5-4 decision that corporations and unions can't be barred from using their money to air their own campaign ads.

The Philadelphia-based election watchdog Committee of Seventy says the decision calls into question the constitutionality of a similar law in Pennsylvania. The Rendell administration says it is reviewing the opinion to determine its impact on state campaign finance law.

Sen. Arlen Specter says it appears only a constitutional amendment will solve the issue created by this decision.