Senate Democrats launched a third consecutive filibuster of the bipartisan defense appropriations bill yesterday, once again blocking consideration of legislation that would fund the United States military and pay members of our armed forces. Yes, it's okay to be thoroughly perplexed by this development. Remember, the ostensible reason that Democrats have engaged in this obstruction over recent months -- which also entailed filibustering the Veterans Affairs appropriations bill -- was to exploit the troops and veterans as leverage to force Republicans to agree to higher federal spending on unrelated matters. It was a cynical play, but thanks in part to President Obama's hyper-partisan veto, it...