CVG really isn't a large enough force in the DL system to justify that in isolation, at least. If anything it's a combination of DTW/MSP hubs, line stations, and malcontented employees at PMDL hubs who have been pushing for the IAM. If the IAM knew how to effectively run a campaign for DL (and B6) employees they would have been certified years ago. The IAM hasn't realized the tactics at NW, TW, and UAL no longer and will not work at DL. They haven't changed their organizing approach. And it would be against the law if it was discovered DL was closing this operation at CVG because of employee interest in organizing. Airlines and other employers certainly have taking action like this, but it's against the law.