A key intelligence report that could aid accused Fort Hood shooter Maj. Nidal Hasan’s defense is being withheld by the Obama administration, according to a letter obtained by Fox News as part of its ongoing investigation of a radical American cleric. . . . . John Galligan, Hasan’s defense attorney, told Fox News that he requested the White House intelligence report nearly a year ago, and it is only now that he has officially been told the information will not be available.