Mexican President Felipe Calderon speaks about Arizona's new immigration law on Monday.

Mexican President Felipe Calderon slammed Arizona's tough new immigration law, saying it "opens the door to intolerance, hate, discrimination and abuse in law enforcement."

Calderon vowed to help protect the rights of Mexicans living in the United States, offering lawyers and immigration experts."

"Nobody can sit around with their arms crossed in the face of decisions that so clearly affect our countrymen," he said.

The new state law, which makes it a crime to be an illegal immigrant, is set to take effect this summer.

Tensions are already simmering along the border.

For the first time in 40 years, the Mexican state of Sonora, which borders Arizona, canceled a joint meeting of the Sonora-Arizona Commission in Phoenix.

"This is not about a breaking of relations with Arizona, but rather a way to protest the approval of the law," government officials said.

Some Mexican legislators have urged a trade boycott against Arizona.

"In Congress, we support any trade and transport boycott necessary to reverse this law," said Oscar Martin Arce, a lawmaker from the president's National Action Party.

Mexico is Arizona's largest foreign market, with $4.5 billion in exports last year alone, according to the U.S. International Trade Administration.

The controversial law requires Arizona police to question people about their immigration status if they suspect they are there illegally. Day laborers can be arrested for soliciting work if they are in the U.S. illegally, and police departments can be sued if they don't carry out the law.

Arizona is home to an estimated 460,000 illegal immigrants.

President Obama has asked the Justice Department to review the law and see if it's legal. 

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