President Palmer says he "invok[ed] executive privilege" to bring Sherry in, but executive privilege is a legal doctrine that allows the President and some high-level executive branch officers to refuse to divulge some information related to executive functions. It does not grant the President or anyone else any other authority.
Mason tells his son of an account he has that no one knows about, one with $200,000 in it. That wasn't entirely true. Jack learned of that account in the first episode and accused George of stealing the money after taking down a wealthy arms dealer.