SALEM, Ore. -- A measure on Oregon's Nov. 2 ballot to expand the medical use of marijuana is drawing fire from state district attorneys and the White House drug czar, who says it would turn the state into a "safe haven for drug trafficking."Measure 33 would make it easier for ailing people to obtain marijuana and allow them to possess more of it -- up to a pound at a time. It also requires that indigent patients be given free marijuana.But White House drug czar John Walters, echoing criticism by Oregon's district attorneys, calls Measure 33 a fraud on Oregon...