In a rare display of bipartisanship, advocacy groups from across the political spectrum joined together to call on Gov. Jared Polis (D-CO) to convene a special session of the state Legislature to negotiate the end of a pair of tax-cutting ballot initiatives that would gut the state’s budget so severely that even most conservative groups are opposed to them. Club 20? Not a bunch of libs. Neither are the Colorado Contractors Association, or NAIOP Colorado, which is the state chapter of the Commercial Real Estate Development Association.