They include love notes to his secretary, racist jokes and videos of men sneaking up to women and tearing their clothes off in public.
Rosenthal forwarded a racist e-mail comparing former President Clinton to stereotypes of black men and received other racist e-mails.
The e-mails also show Rosenthal used that e-mail account to strategize about his campaign. It is illegal in Texas to use government property for political activity.
Harris County Attorney Michael Stafford asked the state attorney general to look into the case.
Neither Rosenthal nor his attorney, Ronald Lewis, returned telephone calls from The Associated Press.
Rosenthal told top county officials yesterday he would not resign despite admitted poor judgment.
