Obama cuts into Clinton support

Exit polls in Wisconsin offered ominous warnings for Sen. Hillary Clinton as she tries to reconstitute her political base in Ohio, Texas and elsewhere.

Obama defeated her among less educated voters and nearly tied her among white women -- two groups that have formed the core of her candidacy.

Young voters turned out in droves for Obama, more than offsetting Clinton's advantage among seniors. Wisconsin voters also said the need for change trumps experience 2-to-1.