 The governors of Arizona and Texas have asked the federal government to send additional National Guard troops to help those already there supporting local law enforcement efforts against drug trafficking.Calls for National Guard deployment on the border greatly increased after the 2010 murder of Arizona rancher Robert Krentz, possibly at the hands of Mexican drug smugglers.In March 2009, the Obama administration outlined plans to redeploy more than 500 federal agents to border posts and redirect $200 million to combat smuggling of illegal drugs, money and weapons.