The Supreme Court today summarily dismissed Montana's challenge to the Citizens United case, in a 5-4 vote that made it plain the justices who opened the door for massive corporate contributions are in no mood to revisit the issue, despite the fact that the transparency they predicted in their opinion has not materialized.

You can read the court's ruling and Justice Stephen Breyer's dissent here. Plain English translation: The court's majority threw out a Montana Supreme Court decision that upheld the state's long-standing prohibition against corporations donating to political campaigns.

We'll have more news later today here. Read the Sunlight Foundation's reaaction on our main blog.