WASHINGTON — Sen. Hillary Clinton on Tuesday backed her husband, Bill Clinton, for fervently refuting questions about his anti-terror strategy, even as Secretary of State Condoleezza Rice challenged the former president's claims that he aggressively pursued Usama bin Laden. Bill Clinton appeared on "FOX News Sunday With Chris Wallace" on Sunday, where he said he did more than many of his conservative critics to pursue bin Laden, and left behind for the Bush administration a comprehensive plan to fight Al Qaeda.