Barring a dramatic change over the next few days, political experts expect Democratic Gov. Steve Beshear to handily beat Republican challenger David Williams Tuesday. Beshear, who holds a significant double-digit lead in recent polls, and Williams top a ballot that hasn’t generated much interest among voters across the state. Secretary of State Elaine Walker predicted Tuesday’s turnout somewhere between 25 and 28 percent based on absentee voting numbers, down from the 37 percent turnout when Beshear beat Republican Gov. Ernie Fletcher in 2007.