How many people are members of the Republican Party?

The number of people that affiliate themselves with the Republican party on an ongoing basis changes from year to year, day to day. You can search Real Clear Politics for today's number. http://www.realclearpolitics.com/ Historically, the last ten presidential elections have favored the Republican party with an average of 50% voting Republican, 46% voting Democrat and 4% voting for a third party or independent candidate. http://www.infoplease.com/ipa/A0781450.html Date: July 10, 2009