Lawmaker: Most illegal immigrants tied to drug, human smuggling

Allen said there is an element of cross-border criminal activity that needs to be addressed, but that makes up just 5 percent of illegals crossing the border.

"Fanning the flames of fear and insecurity across the country by inflating the realities here simply won’t result in good policy, just in good campaign speeches," Allen said.

Flake had just returned from a tour of Arizona border areas in Douglas, Nogales and Yuma along with Arizona GOP Sen. John McCain and Republican Reps. David Schweikert, Paul Gosar and Ben Quayle. The tour included a meeting with the widow and brother of Robert Krentz, a rancher slain last year near the border.

Flake is vying for the Republican nomination to seek the seat being vacated by Sen. Jon Kyl (R-Ariz.), who is retiring in 2012.

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