Republican loathing for Hillary Clinton used to be viewed as her Achilles' heel. But Tuesday night in Philadelphia, she wore Republican hate as a badge of honor, fending off her Democratic rivals' sharpest attacks yet by casting herself as a kind of partisan warrior queen. Barack Obama, pressed for weeks by his donors and by the media to take on Clinton more directly, came out swinging against her, moving from uncertainty to a more confident criticism. She parried an early blow from him, an accusation that she is too close to President Bush and his party on Iran. "I don’t...