In a debate hosted by National Review Institute, Rep. Crenshaw and Cato Institute's William Ruger take opposing sides on the question of America's role in the Russia-Ukraine War. Does America have a strategic interest in providing support to Ukraine? More broadly, does America have a duty to defend liberty abroad? Do our own freedom and prosperity depend on success of these values around the world?   William Ruger is a research fellow at Cato Institute and the President of the American Institute for Economic Research. Follow him on Twitter at @WillRuger.   The moderator for the debate is Adam Klein, the Director of the Robert S. Strauss Center for International Security and Law, The University of Texas at Austin School of Law.