Edited sentence: For each Chamber, twenty votes on economic issues and twenty votes on personal liberty are selected to rank members for their support of individual liberties.The Liberty Index rates members of Congress on their official roll call votes during each session of the House and Senate.These forty votes are chosen and tallied by Professor Clifford F.Thies is a Professor of Economics and Finance at Shenandoah University (Virginia) and a past Chairman of the Republican Liberty Caucus.Thies to create an index from 0% to 100% measuring how much the member has voted in favor of economic and personal liberty