Former US Special Envoy to Ukraine Kurt Volker was widely seen as Republicans' impeachment ace in the hole. On Tuesday on Capitol Hill, it didn't work out that way.

Former US Special Envoy to Ukraine Kurt Volker was widely seen as Republicans' impeachment ace in the hole. On Tuesday on Capitol Hill, it didn't work out that way. | Analysis by @cillizzaCNN https://t.co/H7YIVCt3Vq

— CNN (@CNN) November 20, 2019