[simage=6714,200,y,left] Republican Presidential candidate Newt Gingrich will be in Knoxville Tuesday evening. The former House Speaker will stop at the Swamp Fox Pub and Grille from 6-6:45 to participate in a meet and greet. Gingrich still leads in many of the recent Iowa polls, but has slipped to third behind Ron Paul and Mitt Romney in the latest Iowa poll released by Public Policy Polling. The Iowa caucuses take place on January 3rd.