Because of the aforementioned visits, DeBlasio is unable to get security clearance from the Federal Government and cannot be briefed on possible terrorist activities involving NYC. This fact was concealed by the media until after the election. He also voted multiple times as Bill De Blasio before legally changing his name.
Where are you getting this from?
Lots of questionable scumbags get Federal security clearances, and his elected position as NYC Mayor would qualify him, if he even needed one in the first place
Do you have credible information that he was denied?
Interesting!