US suffers from secrecy
The US government suffers, in general, from too much secrecy, plus a
double standard for enforcement of secrecy rules (important officials
are treated with leniency).
The problem of oversecrecy was recognized decades ago, but it got much
worse through overreaction to the Sep 2001 attacks. In general, the US
reaction to those attacks has been quite harmful (most notably,
attacking Iraq based on lies).
Whether to mark something as secret depends on a judgment call by some
official. The structure of this tends to push officials towards
oversecrecy. If they don't mark something secret, and later on it
appears that publishing it may have caused some bad consequences,
people will blame them. If they do mark something secret, and later
on it appears that concealing it caused some bad consequences, no one
will blame them. For their career safety, they mark it secret by
default. Systematically, the result is oversecrecy.