The Office of the President denounced Arizona’s anti-immigrant law:
The Government of Mexico condemns the approval of Law SB1070 “Immigration, Enforcement of the Law, and Safe Neighborhoods” by the State of Arizona, signed on April 23d by Governor Janice K. Brewer.
The criminalization of the migration phenomenon, far from contributing to cooperation and collaboration between Mexico and the State of Arizona, represents an obstacle for the solution of the common problems of the frontier region and in North America as a whole.
The Office of the President of the Republic reiterates its absolute commitment to the protection of the Human Rights and the dignity of all Mexicans abroad, independently of their immigration status. The Government of Mexico will use all the means at its disposal in order to assist its nationals.
A useful Arizona state Senate fact sheet on the bill is available here.