White House: If Iran Proxies Keep Attacking Troops, We'll Continue 'to Mitigate that Threat'

On Monday's broadcast of MSNBC's "Andrea Mitchell Reports," White House National Security Council Coordinator for Strategic Communications John Kirby responded to claims that the U.S. is failing to deter Iranian proxy groups by stating that if the attacks continue, "we're going to have to continue to respond and respond aggressively and appropriately to mitigate that threat."