If we are limited to serving presidents, George W. Bush. He completely redefined the role of the President in the US, and the US in the world. Everything was completely horrible and wrong but he woke up much of the electorate. GWB ignited a fire in the liberals, centrists, and moderates while forcing many conservatives to rethink and reevaluate the meaning of conservatism in governing.
Without him, the US would still be ignoring or accepting racially and socially divisive rhetoric of two Americas. Many Americans would still wrongly believe that America can do what it wants around the world.
I'm so thankful we've had such a president who was so sure of himself and dismissive of the dissenting opinion. America will rebound stronger than it would have without a president like George W. Bush.
I would cite regulation, but I know you will simply ignore it.
