Just possibly enough crud got past the pump basket to goop up the impeller. Hair can wreak havoc with impellers. Make absolutely sure the pump cannot power up and reach into the impeller area with your finger(s). Open all switches including the circuit breaker for the pump. With the basket removed you will see the hole leading to the pump chamber. The impeller should be right on the other side of the basket housing and the vanes should be clean and free of debris.
Best guess for now.
Al