The Oregon Legislature on Monday passed a bill today aimed at halting the stranglehold of big money special interests in politics.

The measure calls for a federal constitutional amendment to undo Supreme Court decisions in several controversial cases, including Citizens United v. FEC (2010), which has led to a dramatic rise of undisclosed campaign spending and an expansion of corporate influence in politics.

“It’s time to take back our democracy,” said Kate Titus, executive director of Common Cause Oregon, which championed the bill. “We don’t have to sell our government and laws to the highest bidder.”

Fifteen other states have already sent similar messages to their congressional delegations.