The lawsuits accusing Mr. Bush of exceeding his constitutional powers were filed in federal courts were filed in New York by the Center for Constitutional Rights and in Detroit by the American Civil Liberties Union.
The New York suit – filed on behalf of the center and individuals – names Mr. Bush, the head of the National Security Agency, and the heads of the other major security agencies. It challenges the NSA's surveillance of persons within the United States without judicial approval or statutory authorization.
It asked a judge to stop the president and government agencies from conducting surveillance without a warrant of communications in the United States.
The Detroit suit, which also names the NSA, was filed by the ACLU, the Council on American-Islamic Relations, the environmental group Greenpeace and several individuals.
and in New York by the Center for Constitutional Rights (.pdf).
A White House spokesman called the lawsuits "frivolous" and said they will do nothing to enhance civil liberties or protect the American people, reports CBS News correspondent Mark Knoller.
"If you're not talking to a known al Qaeda member or a member of an affiliated organization, you don't have to worry about this," White House press secretary Scott McClellan said.
The plaintiffs find plenty to worry about, however, CBS News chief White House correspondent John Roberts reports. They are not suspected terrorists. They are attorneys and journalists who believe the government may have targeted their contacts with clients and sources overseas. While they have no proof, they argue the NSA is too powerful and needs to be checked.
Mr. Bush, who said the wiretapping is legal and necessary, has pointed to a congressional resolution passed after the attacks of Sept. 11, 2001, that authorized him to use force in the fight against terrorism as allowing him to order the domestic eavesdropping program.
Between the lawsuits and the pending Senate hearings, the White House is beefing up its defense. CBS News has learned the Justice Department is aggressively working to expand the legal justifications of the NSA spying program and could make those arguments in public later this week.
The program authorized eavesdropping of international phone calls and e-mails of people deemed a terror risk.