Is Judge Sotomayor's Cheerleading for Obama Proper?

Ed Whelan has this very interesting post on whether Judge Sotomayor's public support for Obama's election as President was unduly partisan. Indeed, Whelan suggests the Sotomayor may have violated the canons of judicial ethics requiring judges to maintain the appearance of impartiality.

I have to say that, when I was a federal judge, I certainly would have been reluctant to wade into the merits of what happened during a Presidential election to the extent that Judge Sotomayor did.

Update: Sorry for the broken link to Whelan's post, which I just fixed.