Karim writes:

Not sure how they pull this off:

“If CBO scored this plan, it would find net tax relief of approximately $1.5 trillion. To the extent future Congresses find that the dynamic effects of tax reform result in additional revenue beyond these targets, this revenue must go to additional rate reductions and deficit reduction, not to new spending.”

Classic!

Bottom line- they sign Grover Norquist pledges because it gets them elected