Seattle activists celebrated a successful campaign to gradually increase the city's minimum wage to $15 by calling for a national movement to close the income and opportunity gaps between rich and poor. Seattle Mayor Ed Murray, center speaks Monday, June 2, 2014, at a rally outside Seattle City Hall after the Seattle City Council passed a $15 minimum wage measure in Seattle. Seattle Mayor Ed Murray, right, waves to the crowd after a sign that reads "15 Good Work Seattle" was raised behind him, Monday, June 2, 2014, at Seattle City Hall after the Seattle City Council passed a $15 minimum wage measure. Seattle City Council member Nick Licata, right, speaks next to the seal of the City of Seattle as Council president Tim Burgess, left, looks on, Monday, June 2, 2014, during debate before the Council passed a$15 minimum wage measure. Carlos Hernandez-Sosa, center left, holds a sign in support of Seattle's $15 minimum wage measure, Monday, June 2, 2014, during a meeting of the Seattle City Council, which eventually passed the $15 minimum wage measure later in the meeting.