In Red and Blue States on 2/3rd of 388 policy questions there is overwhelming agreement
“Comparing the views of people who live in red Congressional districts or states to those of people who live in blue Congressional districts or states, across 388 questions, majorities or pluralities took opposing positions in about one out of thirty cases (just 3.6 percent of the time). In two out of three cases there were no statistical differences.”
Program for Public Consultation, "A Not So Divided America: Is the public as polarized as Congress, or are red and blue districts pretty much the same?," VOP.org, July 2014, accessed Nov 9, 2015, http://vop.org/wp-content/uploads/2014/07/Red-Blue-Report.pdf.