The State Department investigation into how and why the passport files of three presidential candidates were breached is scrutinizing an employee at a Virginia-based company, which is headed by an adviser to Barack Obama’s campaign. The Washington Times, which broke the news Thursday that Obama’s files were improperly accessed, reported Saturday that the State Department inspector general’s internal probe will include polygraph tests of supervisors to determine whether there was a political motive behind the breaches. The article said a focal point of the probe will be an employee who works for The Analysis Corporation and is still with the...