While the nation’s (and news media’s) focus on Malaysian Airlines flight 370 gave Democrats a couple of weeks to catch their collective breath, the 2014 election cycle continues to look increasingly dangerous for President Barack Obama and his party. The most recent NBC News/Wall Street Journal (March 5-9) and CBS News/New York Times (Feb. 19-23) surveys contained little in the way of good news for Democrats — and recent GOP Senate recruiting successes in Colorado and New Hampshire put two more Senate contests into play. Strategists in both parties agree that Democratic enthusiasm isn’t where it needs to be, especially...