Poll: Supreme Court arguments on health law reinforced partisan divide

The findings support conventional wisdom that Obama might be able to benefit politically from a decision striking down the healthcare law. Many pundits believe he could rally his base against a ruling that liberals would see as judicial activism.

Obama said Monday he is confident the court will uphold the healthcare law, including its requirement that almost everyone purchase insurance. The Supreme Court heard three days of arguments last week about whether the mandate is constitutional and, if not, how much of the rest of the law could stand without it.

Overturning the mandate would be "unprecedented," Obama said Monday.