She made specific reference to `` disparaging e-mails '' from Burke about the Iowa senator . Congress : Grassley 's spokeswoman says the new documents raise more questions . Attorney General Scott Peterson is to testify before a committee next week . Justice officials : Documents indicate internal debate about responding to charges . The ATF is alleged to have let guns be taken illegally into Mexico .
Congress : Grassley 's spokeswoman says the new documents raise more questions . Attorney General Scott Peterson is to testify before a committee next week . Justice officials : Documents indicate internal debate about responding to charges . The ATF is alleged to have let guns be taken illegally into Mexico .