Greg has an excellent note on an NR column by Henry Olsen.  The nut is this promising little paradox:

[W]hile Sam Brownback has slashed Kansas taxes for the very richest and seen little beneficial result, economically or politically, Scott Walker has pursued broad-based tax relief and succeeded on both counts. The political benefits have come not only because Wisconsin has seen more growth but because of the more democratic and republican political morality Walker’s policy represents.

(source: The Real Job Creators | Greg Forster | First Things)