WASHINGTON (Reuters) -The FBI improperly conducted warrantless searches for information about a U.S. senator and two state officials, a U.S. intelligence agency revealed on Friday, as lawmakers are weighing whether to renew the surveillance power that makes such searches possible. The names of the U.S. senator, the state senator and the state judge targeted were not disclosed. The disclosure by the Office of the Director of National Intelligence (ODNI) followed a secret court order reauthorizing the use of Section 702 - the part of the U.S. Foreign Intelligence Surveillance Act that allows t...