FILE - Angel Lambart holds her 18-month-old daughter, Gwendolyn, as she gives a thumbs down during a City Council vote on whether to add fluoride to city water in Portland, Ore., Wednesday, Sept. 12, 2012. (AP Photo/Don Ryan)

Decision time for Portland fluoridation

If voters say no, Portland will remain the largest U.S. city yet to approve fluoridation to combat tooth decay. Voters in Portland twice rej…