David Dayen at FireDogLake notices something amid the Democrats’ high-fiving about last night’s primaries:

I guess Michael Bennet won his primary in Colorado yesterday, but his winning total of votes came in under both GOP contenders. The Connecticut Governor’s primary featured just 20% Democratic turnout. While I’ve seen a lot of talk about the positive results for Democrats in last night’s primaries, it seems to me the story is about the lack of participation on the Democratic side.