Tony Stewart won his fourth race of the Chase, holding off points-leader Carl Edwards to take the AAA Texas 500 at Texas Motor Speedway on Sunday.  Despite his fourth victory in eight races, Stewart and his number-14 car still trail Edwards by three points in the points.  Kasey Kahne [[ Kane ]], Matt Kenseth and Greg Biffle rounded out the top-five.  Kenseth's finish pulls him into fourth-place in points, 38 points shy of Edwards, while Kevin Harvick held on to the third spot with a 13th-place finish.  Harvick remains 33 points back of the front-charging combo of Edwards and Stewart with two weeks remaining in the season.  Five-time defending Cup champ Jimmie Johnson made up no ground with a 14th-place finish and remains 55 points out in sixth place.  The series heads to Phoenix International Raceway next week before closing the season at Homestead-Miami Speedway on November 20th.