All of the following graphs show the percentage of all seats held by the Democrats as a result of the election held in that year. The Senate graphs include seats that were not up for reelection in that year.
In the following two graphs, the South is defined as the eleven former Confederate states (Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee, Texas, and Virginia).
In the following graph, the Mountain states are defined as Arizona, Colorado, Idaho, Montana, New Mexico, Nevada, Utah, and Wyoming.
In the following two graphs, the Northeastern states are defined as the eleven states between Maine and the District of Columbia (Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont). I coded Independent Bernie Sanders of Vermont as a Democrat in the first graph.
Note: These graphs remain the property of David Lublin. Please do not reproduce for other than personal use without written permission.
The views and opinions expressed in this page are strictly those of the page author. The contents of this page have not been reviewed or approved by the American University. If you have any questions about this page, please email David Lublin at dlublin@american.edu. This page was last updated on November 9, 1999.