Clements had supported Bert T. Combs for governor against Chandler in 1955, and did so again against Harry Lee Waterfield in 1959. Combs defeated Waterfield and rewarded Clements by appointing him state highway commissioner. In 1961, Clements and Combs split over a proposed deal to lease dump trucks from a Louisville car dealer. State newspapers charged that the deal was payback to the dealer, a Combs supporter. When Combs canceled the deal Clements took it as a public rebuke and soon after resigned to work on the presidential campaign of his friend, Lyndon Johnson. Following his split with Combs, Clements allied himself with the Chandler faction, opposing Combs' lieutenant governor, Wilson Wyatt in his bid to unseat Senator Thruston Morton. Clements' influence declined rapidly after the split with Combs, and by the 1963 gubernatorial race, he was unable to deliver his home county for Chandler in the primary against Edward T. Breathitt. Clements died in his hometown of Morganfield, Kentucky on March 12, 1985.