WASHINGTON — Is this another John Kerry flip-flop? Less than three weeks after vowing in defeat to sweep aside partisan bickering, Kerry is slamming the White House for "a right-wing assault on values and ideals that we hold most deeply." In a new four-minute Internet ad on his campaign Web site, Kerry paints a doomsday future based on Bush's recent nods to fill vacated Cabinet posts. "The Cabinet is being remade to rubber-stamp policies that will undermine Social Security, balloon the deficit, avoid real reform in health care and education, weaken homeland security and walk away from critical allies...