Come see the Cajun Pawn Stars prepare for a presidential visit as they hope to secure a series of letters signed by Richard Nixon. Will the guys inaugurate a buy or will the whole deal get vetoed?  Then, the wheels get a turnin' when Tammie and Johnnie check out a customized ATV. Will negotiations be smooth sailing or are they in for one very bumpy ride? And later, Johnnie and Walt duck for cover when a pair of British Tower rifles walks through the doors. Will the guys bite the bullet and lay out some serious cash or will their offer fail to ignite excitement?