The Tea Party? You mean the guys that shut down the government because of their ideological insanity? No thank. Russel Brand all the way if that the choice I have.
The government shut itself down. If it were running appropriately, we wouldn't have any of these issues.
Someone seriously suggested Miley Cyrus? You guys may as well find a dirty diaper and use it as a bitcoin mascot, it would get more positive coverage than she is.
What you need is a well-known and respected individual, one who has more respect among the citizens than among the top tier in life--regardless of their personal views, sexual choices, music choices, etc. They need to be as pallatable to the majority as possible while still commanding authority.
You guys are just choosing random celebs and some political folk--at this rate the dirty diaper would do better. Even if a celeb was the best choice (which, they aren't), they wouldn't back something unless it's something they personally loved--and could get paid for the advertisement.