Just prior to the first debate? I would assume it would be Oct 14, after the last one. Hillary's not good unscripted, and she won't take on something that isn't a metaphorical certainty.
1) This week, RNC convention and very Presidential speech net Bush a 10 point lead in some polls.
2) Sep 5-15. Kerry continues to flip-flop, and get caught in more lies about his Vietnam "service."
3) Sep 15-28. Media covers Kerry implosion 24/7. Dems panic, launch "Torricelli Switch" trial balloon.
4) Sep 28. Kerry, under pressure from every side, drops out for X reason. (X = health, family, ?whatever dumb thing Kerry thinks of?)
5) Sep 29. Hillary "drafted" by Dems, makes droaning "Ya know" speech. Liberal media go nuts, 24/7 Hillary love fest begins.
6) Month of Oct. Hillary gets clobbered by Bush in debates - liberal media still oozes over her "Strong performances."
7) Nov 2. Hillary wins by narrow margin as liberal precincts around the country report record turnout - 150-200% in some cases.