There is no such thing as "The head of the Tea Party". If someone says they are, they are lying.
Let me correct myself.
Allen Olson, who is the chairman of the Columbia SC Tea Party, supports Gingrich. See below.
http://www.thestate.com/2011/09/14/1970515/sc-politics.html
Tea Party leader to resign post
(excerpt)
Allen Olson, chairman of the Columbia Tea Party, said Tuesday he will resign his post in order to endorse former U.S. House Speaker Newt Gingrich in his bid for the White House.
“There is only one candidate for president who is leading on what I believe are the underlying issues this country faces,” Olson said in a statement. “Not only is this candidate talking about serious issues, he is providing real solutions.”
Olson said the deciding factor in his choice to support Gingrich was his advocacy for the “Strong America Now” deficit-cutting plan that seeks to eliminate federal waste.