DENVER - Colorado voters have backed a ballot initiative aimed at limiting campaign contributions and spending across the country.
Amendment 65 won overwhelming support in Tuesday's election.
The measure is largely symbolic. It instructs Colorado's congressional delegation to propose a U.S. constitutional amendment allowing Congress and states to limit campaign contributions and spending. Passing an amendment requires a two-thirds vote in both houses of Congress and the approval of at least 38 states.
The measure was proposed in response to a 2010 U.S. Supreme Court ruling allowing corporations and unions to spend unlimited money in campaigns. Voters in Montana considered a similar proposal.
Lawmakers aren't bound by the vote.
Colorado Common Cause executive director Elena Nunez said voters in the swing state were fed up with the endless stream of campaign ads this year.