NEW YORK (AP) — The furor is not dying down over Rush Limbaugh's verbal attack on a Georgetown law student.The liberal Media Matters for America is starting a radio campaign against him today, spending at least $100,000 for two ads that will run in eight cities. The cities include Boston; Chicago, Detroit; Seattle; Milwaukee; St. Louis; Macon, Ga.; and Cedar Rapids, Iowa. One of the ads urges listeners to call the local station carrying Limbaugh to say "we don't talk to women like that" in their city.The ads use Limbaugh's own words, calling student Sandra Fluke a "slut" and a "prostitute" after she told congressional Democrats that contraception should be paid for in health plans. Under sharp criticism, Limbaugh later apologized.Limbaugh is already fighting back and Media Matters' stance has provoked concerns that an effort to silence someone for objectionable talk is in itself objectionable.