Campaigns Pressure Stations Over '527' Ads

Since broadcast TV and radio stations aren't obligated to run third-party ads, those spots are more vulnerable to efforts to get them kicked off airwaves. While no one tracks the number of legal notices broadcasters receive on political ads, station managers and lawyers say attempts to block ads are growing both in number and intensity, particularly in states with closely contested elections. While some stations buckle under the pressure and drop the ads, most refuse.