Throughout his career, which spans the entire NASCAR Truck Series’ existence, Chris Showalter has won a lot of races. His 700th race in the series might be his favorite among them all, though. Nick Sanchez won the Craftsman Truck Series race at Charlotte tonight over a hard-charging Corey Heim. Chris Showalter has been a competitor in every Truck Series race there has ever been. He has worked with Kyle Busch and some of the greatest in the history of the sport. However, tonight was special. Showalter was brought to tears. A man who won a championship all the way back in 2003 with Travis Kvapil…