The new Pepsi under TBWA has a good start
Their BLUE color and the new tag ’REFRESH’ matches perfectly with Obama’s CHANGE

WOW you almost can’t tell the difference between new pepsi and obama, I shall imagine Obama like drinking Pepsi instead of Coke! (Anamaria Irazabal, director-trademark Pepsi, calling any similarities between Pepsi and Mr. Obama’s message a “happy coincidence.”)
Anyway, I think the new Pepsi has produced some nice campaigns
refresh everything
refresh 2009 symposium
http://refresheverything.com/symposium.html