This does not mean the union is on strike; it means leaders can call a strike at any time if they can't reach a deal in contract negotiations with the city. It's not clear when a

PHILADELPHIA (WPVI) -- Philadelphia's largest city workers union has wrapped up a strike authorization vote. However, ballots with the strike authorization voting will be counted on Thursday. District 33 represents at least 9,000 mostly blue-collar employees, including sanitation workers.

After a year of bargaining, many proposed contracts and a strike authorization vote, the Stanford Graduate Workers Union and Stanford University came to a tentative agreement on a three-year contract,