I did my taxes the other day and had to prove I had health insurance with the threat of a huge fine hanging over my head thanks to RomneyCare.

(The Hill) — Two top aides for President Obama and former Massachusetts Gov. Mitt Romney (R) went at it on Twitter Wednesday over the president’s healthcare law.

Members of both parties have sparred over the law on its one-year anniversary, and things were no different between Obama’s camp and that of his top rival.

Eric Fehrnstrom, a senior adviser to the likely GOP presidential candidate, asked Obama adviser David Axelrod if the president would support Romney’s proposal to let all 50 states opt out of the law:

I wonder if @davidaxelrod will praise Romney’s proposed executive order issuing Obamacare waivers to all 50 states?

Fehrnstrom appeared to address Obama’s frequent praise for the healthcare law Romney enacted in Massachusetts, something political observers have said could be an Achilles’ heel for the Republican.

Axelrod, who recently left the White House but will work on Obama’s campaign, replied:

@EricFehrn I’m not going comment either way until he lands on his final position.

And he added one more for good measure:

@EricFehrn I still admire what he did in MA on health care, though. In many ways, a model for the nation!