It’s not the will to win that matters. ... It’s the will to prepare to win that matters. — Paul “Bear” Bryant HOUSTON -- People here at Ted Cruz’s campaign headquarters are meticulously preparing to win a contested convention, if there is one. Because Donald Trump is a low-energy fellow, Cruz will be positioned to trounce him in Cleveland, where Trump’s slide toward earned oblivion would accelerate during a second ballot. Wisconsin has propelled Trump, a virtuoso of contempt, toward joining those he most despises: “losers.” In the 1992 general election, Ross Perot, a Trump precursor, won 21.5 percent of...