"I think you have a pretty skewed view of what the MCA does, which is to establish what is a lawful, and unlawful enemy combatant. I guess if by "supporting the economy" you mean "actively fighting american forces in a war theatre while under conditions which would make you an unlawful combatant as set forth by the MCA" then yes, you are correct. your statement other than that is pure nonsense. If you think you're gonna be scooped up by the secret service while cruising the mall of america for a tee shirt, you should probablly go grab a foil hat real fast."
I think you're missing the point, which is that they have the authority to do it. That's enough. I really think it's some kind of national empathy issue that makes so many Americans say things like "torture is okay in certain situations". It's as if people think they will decide what situations it will be when the time comes. All these invented phrases, such as "illegal combatants", "criminal elements" and the like is just a way to dehumanize prisoners so the public won't feel bad when terrible things are done to them. If you want to talk about stepping stones I'd say making torture, kidnapping and other dispicable atcs legal is a good stepping-stone on the way to fascism.
As for the candidates, the primary elections seems to be a process where the most insane candidate is picked from the Republican side while the person who is willing to act the most insane is picked from the Democratic side. This time, Ron Paul doesn't seem to be winning for the republicans nor Hillary Clinton for the Democrats so I guess it's not a perfect model. Then again, this election is a bit out of the ordinary.
Being a bit of pessimist when it comes to the US of A I'm predicting McCain as the final winner. Sure, at first Obama (whom I believe will win the primary) will be in the lead in the polls because people are angry at Bush and his misdemeanors, but eventually they will wake up from the daze and remember that their fear of actually living what they learn (that being the new testament. Turning the other cheek for example, or helping the poor) is far greater and go with the greater of two evils.