Back when Mitt Romney was still in the Presidential race, Doug Kmiec was Co-Chair of the Romney Campaign's Committee for the Courts and the Constitution. Today, over at the Slate Convictions blog, Kmiec has a post endorsing Barack Obama for President. An excerpt:

No doubt some of my friends will see this as a matter of party or intellectual treachery. I regret that and I respect their disagreement. But they will readily agree that as Republicans, we are first Americans. As Americans, we must voice our concerns for the well-being of our nation without partisanship when decisions that have been made endanger the body politic. Our president has involved our nation in a military engagement without sufficient justification or clear objective. In so doing, he has incurred both tragic loss of life and extraordinary debt jeopardizing the economy and the well-being of the average American citizen. In pursuit of these fatally flawed purposes, the office of the presidency, which it was once my privilege to defend in public office formally, has been distorted beyond its constitutional assignment. Today, I do no more than raise the defense of that important office anew, but as private citizen.