limiting the u.s. role in his country. >> we've seen some signals in recent days that the new mexican government wants to tone down, wants to scale back on the integrated cooperation. and that's no doubt very, very concerning to u.s. law enforcement agencies. >> reporter: the mexican government announced it's tightening the flow of intelligence and it's still evaluating whether a u.s.-backed program to use polygraph testing to root out corrupt mexican security officials will continue. president obama says he's keeping an open mind. >> i'm not going to yet judgeal fer the relationship between the u.s. and mexico until i hear from them to see what they are trying to accomplish. >> a recent poll shows mexican overwhelmingly welcomed u.s. involvement in fighting the drug war. 74% support assistance in training police and military. 55% approved giving them money