Boxer’s letter is as follows: On December 16, along with the rest of America, I learned that President Bush authorized the National Security Agency to spy on Americans without getting a warrant from a judge. President Bush underscored his support for this action in his press conference today. On Sunday, December 18, former White House Counsel John Dean and I participated in a public discussion that covered many issues, including this surveillance. Mr. Dean, who was President Nixon’s counsel at the time of Watergate, said that President Bush is “the first President to admit to an impeachable offense.” Today, Mr....