 Sour first ran for the legislature in 1964 on the Charlton Lyons gubernatorial ticket, but he was defeated by Democrats in a multi-district race.In that same election, two Republican legislative candidates, Taylor O'Hearn and Morley Hudson, were elected, but Sour and two other Republicans were defeated, Billy Guin, later the last Shreveport public utilities commissioner, and Edd Fielder Calhoun (1931–2012), an insurance agent and civic figure originally from Oklahoma City.In 1968, Sour lost again in a race for the Louisiana House; all of the Caddo Parish Republican candidates were defeated that year except Owen Adams of Greenwood, a member of the parish police jury [county commission in other states].