Last night Chris Matthews’ legendary leg thrill shifted from Barack Obama to Bill Clinton, and then rocketed out of this world: Chris Matthews, reacting to Bill Clinton’s convention speech last night, said, “I always figured that if Bill Clinton landed on Mars, he would know how to do it with them, he would know how to reproduce, he would know everything. He’d just instinctively know how to talk to people.” “I always figured”? As if Matthews has worked through this scenario on multiple previous occasions — possibly for a little adult sci-fi feature he’s plotted out in his head entitled...