If a person has served in the U.S. Congress for more than a term, especially the Senate, I doubt they could be a very good president. Senators are constantly cutting deals and compromising their personal convictions in order to get legislation passed. They rarely have to make quick, independent, on the spot decisions. Such decisions show what a person really believes and is convicted about. Years of political compromise and deal-making severely numbs a Senator's ability to think independently and remain principled.
John McCain has been in the Senate way too long to be a very effective executive, in my opinion. Don't get me wrong, I would rather have John McCain in the White House than Barack Obama, but it's not with excitement. If I vote for McCain, it's only because I'm hoping he appoints the right kind of judges and he is not Obama. My expectations are extremely low when I think of "President McCain".
The above clip shows why I think a long time senator like McCain is weak executive material. The guy has drunk the kool-aid on the global warming farce. Climate change is part of the Earth's cycle. Maybe we're in a warming trend, maybe not. If we are, man's contribution to this trend is vastly overstated. For all the propaganda and "green" talk, the facts remain clear- We are not running out of energy or natural resources. The wrong people have control over current accessible supplies, but we're not running out. We need to drill more in this country and forget the Middle East. Beyond this, ever-fewer people in the world are starving. Food is increasing per head of the world's population. In fact, the biggest threat to third world countries would be enforcing the ridiculous KYOTO regulations on them. The world's species are not disappearing at an alarming rate, in fact new discoveries are happening regularly. Acid rain does not kill forests. Air and water supplies are becoming less and less polluted (thanks to our hard working Black and Veatch engineers!). Forest cover across the world has increased. Oil spills and toxic chemicals in the sea have declined. An honest assessment shows our situation on earth has vastly improved. Much more could be said here, but hopefully by now thinking people have checked both sides of the global warming debate and can make an intelligent judgment on reality. (See This, This, This, and This).
As I watch the clip I see a guy who is doing his best to say the right things to win the right (or should I say left) people. McCain has been around plenty long enough to craft a campaign platform that will appeal the widest group of people. We'll never likely know what he really thinks until he's in the White House, which I think is a dangerous thing. The only thing worse would be Obama in the same situation.
Generally governor's make better presidents. A president is an executive. He or she personally picks a cabinet of advisors to assist in decision making, but the president is the final decision maker for the executive branch of our government. How does a guy or gal who has been making decisions by committee for 21 years and with all sorts of "necessary" compromises fill such a role? Not well, I would suggest.