It's no secret that one of Mitt Romney's biggest vulnerabilities is the fact that he invented RomneyCare in Massachusetts, thus paving the way for the detested Obamacare. What is surprising is that the WSJ -- which you'd think might overlook that in Romney's case, given their general common ideologies -- would pulverize him on the subject. That's exactly what they've done tonight, on the eve of his big healthcare speech, basically branding him has un-credible and self-serving. They say RomneyCare has been a mess, but that really, up until recently he was bragging about its success. What's more, his new...