HC Reform Update by Mark Sanna: Republicans may in fact prefer to "tinker and tweak" the law to keep the debate fresh in the minds of voters in hopes of unseating Obama in 2012. Republicans could use the oversight authority of Congress to slow down or block regulations, essentially tying up the instruction manual for the overhaul. Expect flyspeck scrutiny of agencies implementing the law. GOP lawmakers may be able to pick off unpopular provisions. … Another target is a yet-to-be-named board with the power to make Medicare cuts.