WHITE HOUSE (AP) - President Bush will be in Maryland today to continue his defense of the administration's domestic spying program. He'll be visiting the headquarters of the National Security Agency. Bush will reiterate his claim that he has the constitutional authority to have intelligence officials listen in on international phone calls of Americans with suspected ties to terrorists without court approval. The Foreign Intelligence Surveillance Act requires the approval of a special court set up for the purpose of reviewing secret eavesdropping. The White House says what it's doing is not a domestic spying program, since one end of the phone call or e-mail is always outside the U-S. Spokesman Scott McClellan says a better term would be "terrorist surveillance program." Congress holds hearings next month on whether the president has exceeded his authority.