Letter to State Department in March 2013 - seven weeks asked about personal email . But there was no response until December 2012 after Clinton left . Reply did not answer query about personal email use for official business . Latest revelation casts further shadow as Clinton begins White House bid .
Letter to State Department in December 2012 asked about personal email . But there was no response until March 2013 - seven weeks after Clinton left . Reply did not answer query about personal email use for official business . Latest revelation casts further shadow as Clinton begins White House bid .