The issue focused on by US Attorney General Eric Holder as he sought to crack down on federal marijuana growers is now being dealt with by the California legislature. Mr Holder said he would consider legislation that would give California control over how much marijuana it sends to its neighbour.He also announced that he would review all eight states with legalisation measures on the ballot in November. California has already approved legalisation measures and many others are expected to follow.How does California control its drug supply?Mr Holder said he would consider legislation that