(Portland, OR)  --  The Portland City Council is considering whether to ask voters to decide whether to approve a proposed three-percent tax on recreational marijuana.  Officials say the resulting revenue would go toward drug and alcohol treatment, public safety, and support for small businesses.  The current 25-percent state tax on recreational pot is to drop to 20 percent on January 1st, so if voters approve the city tax, the total tax would be 23 percent.  If the Council gives the okay, the measure will appear on this November's ballot.