washington email u.s. diplomats islamabad state department officials washington whether challenge specific u.s. drone strike pakistan center criminal probe involve hillary clinton handle classify information wall street journal report thursday 2011 2012 email send via low side -government slang computer system unclassified matter part secret arrangement give state department voice whether cia drone strike go ahead accord congressional law enforcement officials brief fbi probe journal say email forward clinton aid personal email account rout server keep home suburban new york secretary state officials say accord newspaper investigators raise concern clinton personal server less secure state department systems recent report state department inspector general find clinton break government rule use private email server without approval undermine clinton early defenses email still-secret email key part fbi investigation long dog clinton presidential campaign officials tell journal clinton week clinch democratic presidential nomination nov. election endorse president barack obama thursday white house rebuff question reporters thursday whether obama endorsement might see unduly influence criminal investigation u.s. justice department involve clinton white house spokesman josh earnest tell reporters obama reiterate commitment principle criminal investigation conduct independent sort political interference email mention cia drone detail militant target write within often-narrow time frame state department officials decide whether object drone strike cia pull trigger officials say accord journal law enforcement intelligence officials say state department deliberations covert cia drone program conduct secure government computer system design handle classify information journal report email clinton probe deal plan drone strike wsj