Vigil said trade frictions could impede the fight.
How fentanyl reaches the U.S.
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But Mike Vigil, a former head of the U.S. Drug Enforcement Administration's foreign operations, said he expected any terrorism designation to have very little impact on day-to-day operations against cartels because many of the same anti-terrorism powers American authorities would be granted are already employed in counter-narcotics efforts.
Mexico vows to defend its rights as Trump seeks to label cartels as terrorists
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