The Press Secretary's disdain for Congress merely reflects his opinion ,[and probably Dubya's and Cheney's as well, ] of a Congress who had charted a luxurious yacht to catch and land a prize winning fish during the Impeachment trial and blew it by cutting bait ..
Despite the proven results of the 'endless investigation' presented to the Senate by the House who had used the latest in sonar gear to track the big kahuna all the way to the Ford Building, it was obvious to this administration that the pretense at 'fishing' by the Senate ,and to the 'investigating 'democrats in the House was but only an act for the public, and in reality to merely further their own self-serving re-election interests for display to their constituents rather than to abide by their sworn duty to uphold the law.
So why bother? Congress is not the same breed of cat or polar or brown bear that the patriots of the Revolution envisioned representatives and senators would be ..., that is , men who would fish..
You captured in a mere 3 words, the prevailing attitude of the populace of this country.