About 40 percent of those polled said they would have mixed feelings if the justices struck down the whole law Thursday, The Wall Street Journal and NBC News poll, released Tuesday, indicated.
Americans are more equally divided on whether they approve of the federal healthcare overhaul, with a little more than 4 in 10 saying it was a bad idea and about 35 percent saying it was a good idea when President Barack Obama signed the law in March 2010, the Journal reported.
On the mandate requiring Americans to hold health insurance or face paying a penalty, 55 percent said it would make no difference if the law was overturned, while 25 percent said it would hurt their family.
"I would keep it in place; it's not the greatest idea, but at least for a person like me who doesn't have health insurance, I'd rather have it," said John Kenyon, a 28-year-old Democrat from Kissimmee, Fla.
Eighteen percent of those polled said it would help their family if the mandate was struck down.
"I don't think the government should force people to buy something or penalize them for not doing so," said Danny Phillips, a 48-year-old Republican from Doswell, Va. "I just think [Obama's] just been too much into big government."
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