After complaints about the dismissal grew, the White House fired back on Wednesday, releasing a letter from a senior counsel to the president sharply criticizing Mr. Walpin’s record. The letter, sent to Senators Joseph I . Lieberman, a Connecticut independent, and Susan Collins, a Maine Republican, justified the dismissal on several grounds, including what it said was Mr. Walpin’s “confused, disoriented” behavior at a meeting of the agency’s board on May 20, when, according to the letter, he was unable to respond to questions.
The letter, from Norman L. Eisen, the special counsel to the president who handles ethics matters, also noted that a career federal prosecutor in Sacramento had filed an ethics complaint about Mr. Walpin’s actions in the case involving Mayor Johnson. And the Eisen letter said that Mr. Walpin chose to work in New York, not in Washington, over the board’s objections and that he “had become unduly disruptive to agency operations.”