It is my opinion, that the Tea Parties must necessarily reflect the largest mass turnout in US history, comprising of a core message of OPPOSITION to the newly inaugurated President. Remember, this TEA PARTY gathering occured within Obama's First 100 Days. I think there is no other example at least in modern American history.
This, if proven, could be quite a claim and should be thrown in the liberals faces; they may well not be able to counter it.
Presumption: The Tea Parties of 15 April 2009 reflect the largest anti-President turnout, in terms of size of crowds when totalled, in American history so early into a new Presidential administration.