 Republican mayoral candidate Mark DeSantis challenged Ravenstahl to sign an 'ethics pledge' in response to this incident.Six months later, mayor Ravenstahl introduced legislation that would have kept UPMC from paying any future taxes, and possibly some current taxes.Further complicating matters was that the mayor held this for weeks until the very last session of the 2007 City Council (2 of the 9 members were outgoing, and one had resigned under indictment).