An NAB spokesman said Tuesday that support for "free and local radio" continues to grow despite the music industry-led effort. The group noted that 251 House members and 25 senators have signed onto resolutions opposing what they believe is a tax on local radio. Sen. Mary Landrieu, D-La., and Sen. John Thune, R-S.D., along with Reps. Dennis Cardoza, D-Calif.; John Boccieri, D-Ohio; Brian Baird, D-Wash.; Joe Sestak, D-Pa., and Dan Lungren, R-Calif., were the most recent to back the resolutions.

Meanwhile, proponents of the legislation are turning up the heat on one radio giant. The MusicFirst Coalition said Wednesday that two Washington, D.C. area Clear Channel stations -- country station WMZQ and WIHT, "Hot 99.5," -- failed to comply with public disclosure rules for advertisements opposing the Performance Rights Act. MusicFirst argued the stations played NAB spots but an inspection of their public filings found no record of the broadcasts and nothing about the stations' opposition to the legislation.