Debate focuses on health care , Obama , economy . John Edwards , Obama keep it cordial , draw comparisons to ex-Sen. Clinton . Clinton pushes experience , Obama pushes judgment . Candidate John Edwards did n't meet criteria , was n't invited .
Debate focuses on health care , Iraq , economy . Clinton , Obama keep it cordial , draw comparisons to ex-Sen. John Edwards . Clinton pushes experience , Obama pushes judgment . Candidate Mike Gravel did n't meet criteria , was n't invited .