Because it is a known issue that USAir has had with Mesa...which is why USAir had already kicked Mesa to the curb until JO snuck back in with the America West merger.

Correct me if I am wrong, isn't the exclusivity part of the Mesa-America West (west coast) flying up at the end of 09...with the total contract itself up in 2012.

Besides if Delta wins the Freedom injunction JO will have to declare Bankruptcy which then Mesa can be kicked to the curb sooner.