Late last month, Charisse Carney-Nunes fired up the computer at her home in Washington to check her e-mail. Her brain already was on morning drive time: breakfast for the kids, her day's work at a government agency. She glanced down at her screen, then froze. "Ms. Carney-Nunes," began the e-mail from Michelle Malkin, a best-selling and often inflammatory conservative writer with a heavily trafficked Web site. "I understand that you uploaded the video of schoolchildren reciting a Barack Obama song/rap at Bernice Young elementary school in June. I have a few quick questions. Did you help write the song/rap and...