Healthy Democracy usually demands that the party that does not perform gets voted out

Democracy is a system that has built-in checks and balances.

The 4-year term provides that check and balance. 

Term limits provides that check and balance.

If a President screws up, you do not put him back in power. That is the power of the people. That is the power of democracy.

If a party screws up -- for 2 terms in a row -- you do not reward them by putting them back in power. If you do, then you send a wrong signal to the entire system -- that it is OKAY to screw up with people's lives and the country's future.

But McCain is not Bush!!!! Why punish him for Bush's mistakes?

Well - as long as he represents the Party that nomited Bush and put him in power, he must inherit all the good and all the bad of that party.