Mercury Marine is not the whole issue here.
As a nation, we have to decide that, rather than "poaching" manufacturing jobs from each other, the states will start making themselves "manufacturing-friendly".
For many years now, we've been told we do not need manufacturing. Dot-coms, information and finance were going to be the next wave. I have concluded that all these things do nothing but pass funny-money between people. Unless there is something with inherent value being manufactured, sold and bought, no one really gets ahead.
Just my opinion.