He didn't get as many votes as Mourdock because he's an @$$hole.
As long as we thought that Dick Lugar was a charming Hoosier, we tolerated his penchant for caving in to the Washington statists. The discovery that Lugar, in fact, really didn't live in Indiana (and even went so far as to charge taxpayers for his hotel rooms when he came to visit)tore the scab off his liberal voting record.