MIAMI — When Jeb Bush left office four years ago, his public appearances were as scarce as bi-partisan man hugs. He didn't want to upstage his successor in the governor's mansion nor his brother in the White House. Instead, he quietly cashed in by joining corporate boards and an elite speakers bureau, penned policy essays and gave infrequent interviews to conservative media. But in recent months, as the Republican Party of Florida has grappled with a leadership vacuum, Bush's political profile has grown as fast as the national deficit ...