Sources: Recent party registration numbers used here are from state election websites and are based on totals compiled in early July 2018. Registration data are as of the following months: October 2016 (Kansas and Rhode Island); February 2017 (Massachusetts); November 2017 (Connecticut); January 2018 (Oklahoma); March 2018 (Arizona and Maine); April 2018 (New Hampshire and New York); May 2018 (California, Florida, Maryland, Nebraska, and Pennsylvania); June 2018 (Arkansas, District of Columbia, Kentucky, New Jersey, New Mexico, North Carolina, and West Virginia); and July 2018 (Alaska, Colorado, Delaware, Idaho, Iowa, Louisiana, Nevada, Oregon, South Dakota, Utah, and Wyoming).