Republican Sen. Rand Paul split with senators Ted Cruz and Marco Rubio to vote for a healthcare bill Tuesday night that will add about half a trillion dollars to the national debt over the next several decades.Paul sided with the overwhelming majority of senators and representatives who voted for the bill, in a decision almost certain to come up in the primary race, where he is currently joined by Cruz and Rubio.The “doc-fix†bill solves a recurring problem in the way Medicare payments are made to doctors, extends a children’s health insurance program, and requires higher-income seniors to pay higher...