Ron Johnson, R-Oshkosh, is among the harshest critics of the Affordable Care Act, also known as Obamacare. Wisconsinites twice elected Johnson on pledges to repeal what he called the “greatest assault on freedom in our lifetime.”

Now that congressional Republicans have their chance, Johnson has emerged as an enigmatic, often contrarian voice in the Senate health care debate. His hard-line conservative stance and objections to what he called “an insane process” to craft a GOP health care bill have helped stymie Senate repeal efforts to date.

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