Now the Republicans are calling Obama's plan to halt deportations by executive action unconstitutional, overstepping his constitutional authority, invading Congress' turf. In the W years they were defending the "unitary executive" concept and the president's authority to add binding "signing statements" to legislation, etc. ISTM that neither party has a consistent position here -- generally, each party always wants supremacy and maximum scope/powers/autonomy for whichever branch it controls at the moment. But that's the parties. Considering liberals and conservatives (and libertarians and socialists, etc.) as such, is there any actual ideological argument that would take a more consistent position on one side or the other of the division-of-powers issue?