- Open: Any voter, regardless of party registration, can vote in the primary of any party.
- Closed: Only registered members of a party can vote in that primary.
- Modified: Usually means only party members can only vote in their primaries, however independent voters can choose to vote in any party’s primary. See below for specific state information:
- Alaska: Parties can choose if they want their primary to be open. According to the Alaska GOP Rules (Article XI) independent voters may vote in the Republican primary
- Maryland: It is unknown if independent voters can vote in the Republican primary.
- Massachusetts: Party members can only vote in their primary. However, independent voters can declare a political party the day of the election and vote in their primary. It is unknown if registered members of parties can switch the day of the primary.
- New Hampshire: Party members can only vote in their primary. However, independent voters can declare a political party the day of the election and vote in their primary. Registered members of political parties CAN NOT change parties the day of the primary.
- North Carolina: It is unknown if independent voters can vote in the Republican primary.
- Rhode Island: Party members can only vote in their primary. However, independent voters can declare a political party the day of the election and vote in their primary. Registered members of political parties CAN NOT change parties the day of the primary, they must change parties 90 days before the primary..
- Utah: It is unknown if independent voters can vote in the Republican primary.
- West Virginia: It is unknown if independent voters can vote in the Republican primary.
- January
- January 14: Iowa
- January 15: Michigan?
- January 19: Nevada, South Carolina
- January 22: New Hampshire, Wyoming
- January 29: Florida, Ohio?
- February
- February 1: Maine
- February 5 (Super Tuesday): Alabama, Alaska, Arkansas, California, Colorado, Connecticut, Delaware, Georgia, Illinois, Minnesota, Missouri, Montana?, New Jersey, New Mexico, New York, North Dakota, Oklahoma, Tennessee, Utah
- February 9: Louisiana
- February 12: District of Columbia, PennsylvaniaMaryland, Virginia
- February 19: Washington, Wisconsin
- March
- March 2: Hawaii
- March 4: Indiana?, Massachusetts, Ohio, Rhode Island, Texas, Vermont
- March 11: Mississippi
- May
- May 6: Indiana, North Carolina
- May 13: Nebraska, West Virginia
- May 20: Kentucky, Oregon
- May 27: Idaho
- June
- June 3: Montana, South Dakota
Updates: - 20070820 - no more opening stuff in new windows, add section with states sorted by primary date
- 20070819 - Released
Information taken from National Association of Secretaries of States Calendar of 2008 State Primaries/Caucuses (last updated on August 9, 2007), Election Assistance Commission - National Mail Voter Registration Form (last updated August 12, 2006) and The Green Papers Presidential Primaries 2008 Republican Delegate Selection and Voter Eligibility. |