Georgia Republicans’ successful effort <a href="http://www.cnn.com/2021/03/26/politics/joe-biden-georgia-voting-rights-bill/index.html" target="_blank">to enact sweeping voting restrictions</a> has ratcheted up pressure on Democrats to take unprecedented steps and change the rules of the US Senate in order to overhaul election law and expand voting access across the country.

But Democratic hopes are running into a