Skip Content
U.S. Flag

Key to Political Party Abbreviations

Adams = Adams

Adams-Clay F = Adams-Clay Federalist

Adams-Clay R = Adams-Clay Republican

AJ = Anti-Jackson

AmKN = American (Know-Nothing)

Anti-Admin = Anti-Administration

C = Conservative

CRR = Crawford Republican

D = Democratic

DR = Democratic Republican (Jeffersonian)

F = Federalist

FL = Farmer-Labor

FS = Free Soiler

IPM = Independence Party (Minnesota)

I = Independent

ID = Independent Democrat

IR = Independent Republican

J = Jacksonian

JR = Jackson Republican

L = Liberty

LO = Law and Order

LR = Liberal Republican

N = Nullifier

NR = National Republican

OP = Opposition

PO = Populist

Pro-Admin = Pro-Administration

PR = Progressive

R = Republican*

RA = Readjuster

SR - Silver Republican

S = Silver

U = Unionist

UU = Unconditional Unionist

W = Whig

Note:  * "Republican" refers to two different parties widely separated in time: Democratic (Jeffersonian) Republicans of the late eighteenth and early nineteenth centuries, and the present Republican party (GOP), which was founded in the 1850s. The dates accompanying the name should make clear which of the two parties is intended. Source: Kenneth G. Martis, The Historical Atlas of Political Parties in the United States Congress, 1789-1989. New York: Macmillan Pub. Co. ; London : Collier Macmillan, 1989; Biographical Directory of the U..S. Congress.


More Information about Political Parties in the Senate