It’s the story that won’t die – possibly because MSNBC doesn’t want it to, since it seems that it could delegitimize the Republican Party and conservatives: Taking “fringe notions” and portraying them to be mainstream, including the issue of President Barack Obama’s citizenship. On Tuesday’s “Hardball,” host Chris Matthews led off his program and scrutinized the reasons why Speaker of the House John Boehner and House Majority Leader Eric Cantor won’t condemn Republican members that question the president’s citizenship. His conclusion? Boehner and Cantor are collaborators, using the myth for political gain. “OK, you know what I want to do...