Despite being forced to close his Tucson and Yuma offices in the wake of death threats, Democratic U.S. Rep. Raúl Grijalva continued his opposition to the state's controversial new immigration enforcement law, saying it has made Arizona "a pariah among state governments."

Not only did Grijalva continue to call for a boycott of convention business for the state, but he sent a letter to President Obama asking him to limit federal cooperation with Arizona officials.

Grijalva called on Obama to reject the bill and predicted it would not hold up to legal scrutiny. "This law will put every policeman in the state on notice that their main duty from now on is to question Hispanics about their citizenship," Grijalva said in a statement. "This is a discriminatory policy that cannot be enforced without committing grave breaches of due process and equal protection."

Grijalva's spokesman, Adam Sarvana said the office received "some pretty scary calls," including two from the same person, "who threatened to go down there and blow everyone's brains out then go to the border to shoot Mexicans."

Grijalva's Southern Arizona counterpart, Democratic U.S. Rep. Gabrielle Giffords, said she was troubled by the threats to her colleague, particularly after the vandalism at her Tucson office after her March health-care vote, when the plate-glass door to her office was shattered.

While she said she disagrees with the boycott, saying it would hurt Arizona's economy, "resorting to vandalism and threats to express political viewpoints is unacceptable. We must work together as a nation to enforce federal immigration laws and strengthen border security."

If you go

Rep. Raúl Grijalva is hosting an anti-1070 rally at 9 this morning at his campaign headquarters, 452 S. Stone Ave.