 Roberts County was one of the earliest counties in Texas to turn Republican.The last Democrat to win the county in a presidential election was Harry S. Truman in 1948, and although Truman won 75.84 percent of the county's ballots at that election, no Democrat since has passed the forty percent of the vote recorded by Texas native Lyndon Johnson in his landslide national victory over Barry Goldwater.Jimmy Carter in 1976 was the last Democrat to pass thirty percent of the county's vote.