The simplest measure of party strength in a state voting population is the affiliation totals from voter registration (from the websites of the Secretaries of State or state Boards of Elections) for the 30 states and the District of Columbia that allow registered voters to indicate a party preference when registering to vote. 20 states (mostly in the South, Midwest, and Northwest) do not include party preference with voter registration: Alabama, Arkansas, Georgia, Hawaii, Illinois, Indiana, Michigan, Minnesota, Mississippi, Missouri, Montana, North Dakota, Ohio, South Carolina, Tennessee, Texas, Vermont, Virginia, Washington and Wisconsin. The party affiliations in the party control table are obtained from state party registration figures where indicated. Only Wyoming has a majority of registered voters identifying themselves as Republicans; two states have a majority of registered voters identifying themselves as Democrats: Maryland and Kentucky (since 2010, Louisiana, Pennsylvania and West Virginia have all seen their Democratic majority slip to pluralities).