Indiana GOP U.S. Senate candidate Richard Mourdock thinks that Medicare and Social Security are unconstitutional. We know this because there is video of Mourdock expressing his incredulity at the idea that the Constitution permits the safety net for seniors to exist — in Mourdock’s words, “I challenge you in Article I, Section 8 of the United States Constitution. where those so-called enumerated powers are listed, I challenge you to find words that talk about ‘Medicare’ or ‘Medicaid’ or, yes, even ‘Social Security.’”