Those who support Kentucky expanded gambling and legalizing casinos are back in the starting gate, mounting another campaign that promotes expanded gambling as a lucrative revenue source during lean times in hopes of a strong stretch run for a proposal mired in defeat. The latest version will be presented as a proposed constitutional amendment that would go on the 2014 fall ballot in Kentucky if approved by the General Assembly. Proposals have been drafted for introduction in the House and Senate. Its most ardent backers insist it’s not such a long-shot, but even they sound worn down by years of…