In the murky waters of state-by-state cannabis laws, many employers have held onto their zero-tolerance policies under the cover of federal law, which still considers marijuana use illegal whether or not it is permitted by a state law. But this is no longer an acceptable status quo for employers with employees in certain states.In the wake of Whitmire v. Wal-Mart Stores Inc., 2019 WL 479842 (D. Ariz. Feb. 7, 2019), employers with operations in Arizona must revisit their drug-testing policies and procedures to ensure they …