By DAVID JOHNSTON and RICHARD W. STEVENSON WASHINGTON, April 1 — Prosecutors investigating whether someone in the Bush administration improperly disclosed the identity of a C.I.A. officer have expanded their inquiry to examine whether White House officials lied to investigators or mishandled classified information related to the case, lawyers involved in the case and government officials say. In looking at violations beyond the original focus of the inquiry, which centered on a rarely used statute that makes it a felony to disclose the identity of an undercover intelligence officer intentionally, prosecutors have widened the range of conduct under scrutiny and...