The Democratic Party are the ones that passed it. The Republicans didn't, not when they held the legislature, not when they held the presidency and the legislature. Even when Romney signed it in MA (to his credit), it came from the Democratic Party held state legislature.

And its passage has helped millions, people I know personally and probably people you know personally. Maybe anyone who'd ever heard the phrase "pre-existing condition" before. It's one of the single most effective and widely beneficial government efforts in our lifetimes.

It's not that fact that Democrats did it by taking the best parts of an opposition party policy isn't impressive, it's that the unseriousness of Republicans when it comes to their own ostensible policy ideas is depressive.