Mexico and Holder Both Suing AZ

Earlier today, ABC reported that Attorney General Eric Holder will likely file his lawsuit against Arizona over its immigration law next week. Now, the AP reports: "Lawyers for Mexico on Tuesday submitted a legal brief in support of one of five lawsuits challenging the law. The law will take effect June 29 unless implementation is blocked by a court."

NBC has more:

The government of Mexico today formally joined a lawsuit in federal court challenging Arizona's new immigration law, saying that the highest levels of the Mexican government have grave concerns about it.

"Each day, approximately 65,000 Mexicans are admitted into Arizona; and each day they spend an average of $7.35 million in its stores, restaurants, and other businesses," says a friend-of-court brief filed by Mexico. But if the new law takes effect, "Mexican citizens will be afraid to visit Arizona for work or pleasure out of concern that they will be subject to unlawful police scrutiny and detention," the brief says.