CINCINNATI --
More than 1,000 Cincinnati-area Delta workers are being asked for their vote to unionize.
On Sunday, the International Association of Machinists union held one of six rallies in connection with the vote.
The move comes after Delta merged with Northwest Airlines.
Before the merger, Northwest Airline's employees were represented by a union.
Officials said that by law, the workers must vote on whether they want to unionize.
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