Congrssman Issa should invite the Mexican attorney general to testify. It would make the Republicans look sympathetic towards Mexicans and it would make 0bama look bad. This is one of the few times that Mexico has a legitimate beef with the U.S. goberment.
...(Chavez) also may have been harmed by ongoing revelations that U.S. officials allowed weapons to be smuggled to known traffickers as part of a federal operation to track down kingpins. Chavez repeatedly avoided appearing before the Mexican Congress to testify about what he knew about the program.