Mexican President Felipe Calderon denounced as "racial discrimination" an Arizona law giving state and local police the authority to arrest suspected illegal immigrants and vowed to use all means at his disposal to defend Mexican nationals against a law he called a "violation of human rights."

But the legislation, signed April 23 by Arizona Gov. Jan Brewer, is similar to Reglamento de la Ley General de Poblacion — the General Law on Population enacted in Mexico in April 2000, which mandates that federal, local and municipal police cooperate with federal immigration authorities in that country in the arrests of illegal immigrants.

Under the Mexican law, illegal immigration is a felony, punishable by up to two years in prison. Immigrants who are deported and attempt to re-enter can be imprisoned for 10 years. Visa violators can be sentenced to six-year terms. Mexicans who help illegal immigrants are considered criminals.

The law also says Mexico can deport foreigners who are deemed detrimental to "economic or national interests," violate Mexican law, are not "physically or mentally healthy" or lack the "necessary funds for their sustenance" and for their dependents.

"This sounds like the kind of law that a rational nation would have to protect itself against illegal immigrants — that would stop and punish the very people who are violating the law," said Rep. Steve King of Iowa, ranking Republican on the House Judiciary subcommittee on immigration, citizenship, refugees, border security and international law.

"Why would Mr. Calderon have any objections to an Arizona law that is less draconian than his own, one he has pledged to enforce?" Mr. King said.

Half of the nearly 1 million illegal border crossings into the United States each year occur in Arizona, according to a report by the Federation for American Immigration Reform (FAIR), which also said Arizona taxpayers spend more than $2 billion a year on education and health care for illegal immigrants and their children.

"The porous border is virtually a welcome mat for criminal organizations that run drugs and other contraband through the state," the immigration watchdog group said, adding that kidnappings in Phoenix are at a record high.

Rep. Luis V. Gutierrez, an Illinois Democrat who was arrested Saturday during a rally at the White House calling on Congress and the Obama administration to enact immigration reform, said more states "could adopt Arizona's draconian law" if Congress doesnt act now.