Yes We Can!Sí Se Puede! With a clenched fist for emphasis! (I wish Barack Obama would stop encroaching on John McCain's and Mike Huckabee's turf.)
Yes you can...what?
For most, it's all about slogans and feeling good, and the vacuous celebrities lending their dubious talents to this video prove the point. Between the production itself and most of the comments, this is like concentrated stupid.
If you want to prove it to yourself, ask a random Obama supporter to name one concrete accomplishment of his that falls within the legitimate Consitutionally-enumerated powers of a senator. You'll probably get something back like "He cares..."
And "We want change!"