(AP) — A high-profile endorsement in hand in the unlikeliest of battleground states, veteran Republican Sen. Pat Roberts is seeking to bolster support in Kansas' rural west, where he needs to win big to fend off independent challenger Greg Orman. Roberts looked vulnerable after the Aug. 5 primary campaign during which Wolf portrayed the 78-year-old senator as a creature of Washington, not Kansas. [...] he's overhauled his campaign, at the behest of national GOP leaders, and has been traveling the state. From Thursday through the weekend, Roberts is scheduled to make seven stops in western Kansas, where a substantial turnout in his favor will be needed to overcome the edge Orman is expected to have in Kansas' urban and suburban counties.