MILWAUKEE — President Barack Obama’s administration launched a multi-pronged assault on Mitt Romney’s values and foreign policy credentials Sunday, while a fresh set of prominent Republicans rallied behind the GOP front-runner as the odds-on nominee, further signs the general election is overtaking the primary season.
A defiant Rick Santorum outlined plans to leave Wisconsin the day before the state’s contest Tuesday, an indication that the conservative favorite may be in retreat, his chances to stop Romney rapidly dwindling.
