"I say to you and to the Mexican people: Let us stand together," Obama said in a ceremony to launch Calderon's state visit. Felipe Calderon, Mexico's president, has denounced a harsh new anti-illegal immigration law recently passed in the US state of Arizona as he began a two-day state visit to Washington, DC. "Despite their enormous contribution to the economy and society of the United States," Calderon said, millions of immigrants "still live in the shadows, and at times, like in Arizona, even face patterns of discrimination". Obama has also opposed the Arizona law. Climate change, economic issues and access of Mexican truckers into the US are also thought to be on the agenda for talks. Al Jazeera English - Americas - Calderon decries US immigration law Will be interesting to see if Barry will push for something to be done about this. He has failed on most promises so far.. It is significant though for him to tell his Mexicans comrades that he stands united with them..