An analysis of Gingrich's support:
The surveys have been consistent about the kinds of voters gravitating to Gingrich. His support "skews way old," as Gallup's Frank Newport puts it, and is greater among self-described conservatives and Tea Party supporters. Both the Gallup and Quinnipiac polls show Gingrich with roughly twice as much support among conservative Republicans as among moderate and liberal Republicans. And Gallup shows him winning 34 percent of the vote from Republicans over age 65, but just 4 percent among Republicans between the ages of 18 and 29.
His "I'm smart" schtick appears to be appealing to the same demographic that wants to read Glenn Beck on George Washington and Bill O'Reilly on Lincoln.