The Bush-Kept-Us-Safe Theory that's become a mantra for his apologists is only one explanation. There are plenty of other possiblities, including: The Terrorists-Are-Dumb Theory (worry a little), The Near-Enemy Theory, The Melting-Pot Theory, The Burden-of-Success Theory, The Flypaper Theory, The Electoral-Cycles Theory, and The Time-Space Theory (worry a lot).
