Who is funding him? Source?
Except for individually wealthy candidates such a Romney or Trump, there is always someone(s) funding any candidate. A primary campaign costs millions upon millions of dollars.
It’s good to know who any candidate’s major donors are.
see here for politico’s take on Gingrich’s major donors:
http://dyn.politico.com/printstory.cfm?uuid=6D328DB6-AA91-8ACE-64BB3E26D69BEAF9