47% of all voters or 90% of Bush voters.
47% of all voters, who are 90% of Bush's voters.
Bush has 47% of the electorate wrapped up, and 5% more leaning his way.
sKerry has 37% of the electorate wrapped up, and 7% more leaning his way.
4% undecided.
To win, Kerry needs all of his voters, all the undecideds, and 2 of 5 Bush leaners, +1.