Politico: Fearing an embarrassing public relations episode, the White House launched a behind-the-scenes offensive Monday to eliminate defections in the Senate over a last-minute cash infusion to save the cash-for-clunkers program. But Democratic leaders are hesitant; although they’re willing to help the White House by approving more money for the program, they don’t want their carefully planned pre-recess voting schedule to fall victim to procedural delays the Republicans may impose to protest …