Here's a post with the letter from White House Counsel Alberto R. Gonzales responding to the letter from Daschle Leahy concerning Estrada.

In somewhat related news, 'Landrieu disavows Estrada ads':

Sen. Mary L. Landrieu, who is now opposing the nomination of Miguel Estrada to a federal appeals court judgeship, ran Spanish-language radio ads during her campaign for a December runoff election saying she supported his nomination...She said she was neutral on the nomination, since it was not yet pending in the full Senate, but the radio station that produced the ad misinterpreted that as support.

"My campaign ran an ad that was intended to convey only that I did not oppose his nomination. Instead, it read as if I had already decided to support him.