On May 2, 2014 Vermont became the first state to call for a convention to amend the U.S. Constitution to reverse the U.S. Supreme Court’s Citizens United decision, which precipitated a flood of cash into politics. These were overwhelming votes, and there was bipartisan support.
Mr. Vieth will probably be interested in knowing that the single application by the state of Vermont is all that is necessary to get the issue of Citizens United on the agenda of a convention. The states have already applied in sufficient numbers to cause a convention call. You can read the 746 application from 49 states at http://www.foavc.org.