1. Powells wife has to die quietly and peacefully sometime prior to 2000. Dole practically begged the guy to be his VP in '96.
2. Bush wins in 2000 by a modest margin, taking New Mexico, Florida legitimately, Iowa, and Oregon in addition to his total in OTL. That gives him 290.
3. Majorly different cabinet. Unsure how this would affect the terror cells.