Re: both "a" and "b," I totally agree.
Notwithstanding your last sentence, my question is, if we agree that the country IS worse off (which would imply that, at some point, it was better), and if we agree (which most of us do, even if it's just subconsciously) that the country's progress or lack thereof is attributed to the leader, then why can't we hope that another good leader will lead us in the right direction?
Cynicism, probably. People, in high places, only looking out for
their interests, as opposed to, leaders looking out for the interests of the people, more than likely.

If Obama wins, the nano-second he makes a decision that doesn't bode well for the people he
SWORE he's fighting for, folks will immediately lose the hope they had when they elected him.
Now, if Obama becomes the "second coming" of JFK, then there
should be a renewed hope. And, you'd think that the American people (if one still believes that we have the voting power we're preceived to have) would continue to vote for someone who resembled Obama for the remainder of this country's existence.