When the Tea Party activities first came to national attention, what was very clear not only from media reports, but also from interviews and first-hand discussions with participants at the various rallies, was the disorganized nature of the grass-roots movements. In fact, left wing organizations and the media were quick to point out and ridicule inconsistent statements from the Tea Party movements that arose because of the disorganization. Certainly different groups subsequently jumped on the bandwagon and allied with them, and, in some cases, attempted to speak for the movement.
Whatever the actual degree of national cohesion exists today, it is also clear that for the left to attack the Tea Party movement, it is in the left's interest to portray the Tea Party as a centrally-controlled, monolithic organization to provide a convenient target. It is also my opinion, not being privy to all the money trails leading to the Tea Party movement, that the Koch brother's supposed influence was exaggerated and emphasized both to provide a target, as well as counter the evidence of George Soros's financing and influencing the left.