This book includes statistical summaries of all fifty Presidential elections. It also presents the records of candidates, political parties, and states involved in those contests. The following definitions will help explain the charts and the terms and abbreviations used in them.
Periods. This book classes Presidential elections into six separate periods. Political parties and conditions in these eras had generally consistent characters. They are 1789-1816, 1820-1852, 1856-1900, 1904-1928, 1932-1956, and 1960-1984.
Regions. States are grouped into four regions.
East: Connecticut, Delaware, District of Columbia, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont, West Virginia.
South: Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, North Carolina, Oklahoma, South Carolina, Tennessee, Texas, Virginia.
Midwest: Illinois, Indiana, Iowa, Kansas, Michigan, Minnesota, Missouri, Nebraska, North Dakota, Ohio, South Dakota, Wisconsin.
West: Alaska, Arizona, California, Colorado, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, Wyoming.
Some states participated in primaries and conventions while still territories and these results are included in the summaries for the appropriate regions. Territories that never attained statehood, such as Puerto Rico, are also included and their primary and convention statistics are listed in the columns under the heading "Other" in the relevant charts. For statistical purposes, the District of Columbia is considered a state.