The Supreme Court ruled that the government could not restrict independent expenditures by corporations or unions to political campaigns in

A) Buckley v.Valeo (1976) .
B) Bush v.Gore (2000) .
C) Citizens United v.Federal Election Commission (2010) .
D) FCC v.Pacifica Foundation (1978) .

The Supreme Court ruled in Citizens United v. Federal Election Commission (2010) that the government could not restrict independent expenditures by corporations or unions to political campaigns. This decision overturned provisions of the McCain-Feingold Act that prohibited such spending by corporations and unions within 30 days of a primary election and 60 days of a general election. The ruling was based on the First Amendment's protection of free speech and has had significant implications for campaign finance laws and the role of money in politics.