Supreme Court's key rulings on campaign finance

The basics of the Supreme Court's landmark decision on campaign finance:

OVERTURNED

-A 63-year-old law, and two of its own decisions, that barred corporations and unions from spending money directly from their treasuries on ads that advocate electing or defeating candidates for president or Congress but are produced independently and not coordinated with the candidate's campaign.

-The prohibition in the McCain-Feingold Act that since 2002 had barred issue-oriented ads paid for by corporations or unions 30 days before a primary and 60 days before a general election.

LEFT IN PLACE

-The century-old ban on donations by corporations from their treasuries directly to candidates.

-The ability of corporations, unions or individuals to set up political action committees that can contribute directly to candidates but can only accept voluntary contributions from employees, members and others and cannot use money directly from corporate or union treasuries.

-The McCain-Feingold provision that anyone spending money on political ads must disclose the names of contributors.