Romney Struggling To Attract White Working Class By ALAN FRAM Republican Mitt Romney is faltering with white working-class voters crucial to his party's drive to capture the White House, even as he tries to fend off a rising GOP challenger, Rick Santorum, who wields strong blue-collar appeal. The wealthy former Bain Capital chief has led his rivals by comfortable margins among white college graduates, according to combined polls of voters in the first five states that held presidential nominating contests. But the exit and entry surveys showed only a modest Romney advantage among whites who lack college degrees, the yardstick...