The individual mandate? Having one, or even a few proposals brought up by a Republican, or enacted by a Republican governor in very liberal Massachussetts, does not reinforce the opinion Obamacare is a Republican plan.

Not having a single vote in support of it, from the GOP, leaves it as a partisan measure.

More about Obamacare..... it originated in the Senate, and wasn't going to meet SCOTUS approval until Chief Justice Roberts turned it into a tax measure which then made it acceptable. Yet, all tax measures.... every single one, are supposed to originate in the House, according to the Constitution.