On July 7, four voters who wish to contribute more than $1,500 to an independent candidate for Governor filed a federal lawsuit, challenging the Maine campaign finance law that lets individuals give $3,000 to a candidate who runs in both a partisan primary and a general election, but only $1,500 to a petitioning candidate. See this story. The case is Woodhouse v Maine Commission on Governmental Ethics and Election Practices, 1:14-266. Thanks to Thomas MacMillan for the link. This case is very similar to one filed recently by the Constitution Party in Wyoming.
I hope they have plenty of success in this. A similar Colorado law was struck down in January, just a couple of weeks before the Oklahoma Ethics commission proposed its own similar rule. They say they are looking into it, but we will see what they have to say. If they rule goes into effect in Oklahoma, I hope someone challenges it right away.