The attack on ObamaCare was that Congress does not have the power under the Commerce Clause to force a private citizen into a private contractual relationship. If such a thing is permitted to stand the anti-ObamaCare forces argue there will be no limit to Congress's power in the future.
I haven't trusted polls since I read that 62% of women had affairs during their lunch hour. I've never met a woman in my life who would give up lunch for sex.