Virginia elected officials thought they had taken politics out of highway funding when they adopted a new way of scoring and ranking transportation projects three years ago. But maybe not in this election year. With three statewide offices and the House of Delegates up for grabs in three weeks, a regional spat over highway funding caught fire Monday, as Secretary of Transportation Aubrey L. Layne Jr. took aim at Republican political leaders in Southwest Virginia who have accused Gov. Terry McAuliffe, a Democrat, of doing too little to fund critical road projects in their region. Layne told the House Appropriations...