Along with advancing the border security portion of the illegal immigration issue, Frist should demand the Feds enforce the Immigration Reform and Control Act of 1986. This would prosecute and punish those employers who choose to violate the law by hiring illegals. Also, Frist might want to talk about removing existing legislation that helps illegals with medical services and welfare handouts.
The last action on the immigration reform issue should be to address a guest worker program. The VERY last.