Eugene Stansberry managed Air Wisconsin's operations at the Kalamazoo Airport from $1999$ until $2007,$ when he was

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terminated. His wife suffered from a rare autoimmune disorder throughout his employment period. Between February and May $2007,$ Stansberry failed to notify corporate headquarters about six security violations received by his subordinates and exchanged emails with his supervisor about his poor performance. Also during this same period, his wife's health deteriorated, and Air Wisconsin's health plan administrator informed him that it would no longer cover a treatment program that would improve her condition. In July $2007,$ Air Wisconsin fired Stansberry for poor performance, including his failure to stay within budget, failure to report security violations, and improper supervision of employees. Does Stansberry have a case under the ADA?