An editorial in the Houston Chronicle points out the negative effects of state-level legislation regarding immigration, and calls for comprehensive immigration reform.
Arizona, for example, has so far spent more that $1 million in taxpayer dollars for legal fees in attempts to defend its immigration-related statutes in federal court, and has lost much more than that due to boycotts of the state over its immigration policies.
Immigration policy is a national issue, and must be addressed by federal legislation.
You may find the editorial here.