Related Clues:

• Florida election challenger
• "An Inconvenient Truth" narrator
• Reason for an NC-17 rating, maybe
• ''Running of the bulls'' threat
• Bush antagonist
• Quayle's successor
• Author Vidal
• Tipper, for one
• Triangular insert
• 1990s veep
• Whom Bush whacked
• 2000 also-ran
• Cause for an R rating
• Al who ran
• Spear