Even the Katie Couric / Dan Rather network airs this advertisement.youtube. _________________________________________________________ The refusal by ABC and NBC to run a national ad critical of President Obama's health care reform plan is raising questions from the group behind the spot -- particularly in light of ABC's health care special aired in prime time last June hosted at the White House.com/watch?v=TEHl_RhpMh8 ABC aired a one hour Obamainfomercia on Obamacare and NBC devotes two networks (NBC and MSNBC) to fawn over Obama yet they will not allow American doctors 30 seconds to weigh in on the devastating