The parliamentary battle of the NSDAP [Nazi Party] had the single purpose of destroying the parliamentary system from within through its own methods. It was necessary above all to make formal use of the possibilities of the party-state system but to refuse real cooperation and thereby to render the parliamentary system, which is by nature dependent upon the responsible cooperation of the opposition, incapable of action.

Ernst Rudolf Huber (1903-1990), German jurist and constitutional historian

Constitutional Law of the Greater German Reich [Verfassungsrecht des Grossdeutschen Reiches] (1939)
    (Source)

Reprinted in National Socialism, US State Department (1943).