Claim: The Republican Party contrasts with the Democratic progressive platform that advocates for gay rights.

Modern American liberalism is the dominant version of liberalism in the United States . It is characterized by social liberalism , and combines ideas of civil liberty and equality with support for social justice and a mixed economy . The term `` modern liberalism '' in this article refers only to the United States . In a global context , this philosophy is usually referred to as social liberalism .   The American modern liberal philosophy strongly endorses public spending on programs such as education , health care , and welfare . Important social issues today include addressing inequality , voting rights for minorities , affirmative action , reproductive and other women 's rights , support for LGBT rights , and immigration reform .   Modern liberalism took shape during the twentieth century , with roots in Theodore Roosevelt 's New Nationalism , Woodrow Wilson 's New Freedom , Franklin D. Roosevelt 's New Deal , Harry S. Truman 's Fair Deal , John F. Kennedy 's New Frontier , and Lyndon B. Johnson 's Great Society . American liberals oppose conservatives on most issues , but not all . Modern liberalism is historically related to social liberalism and progressivism , though the current relationship between liberal and progressive viewpoints is debated .   John F. Kennedy defined a liberal as follows :   Franklin Delano Roosevelt in 1941 defined a liberal party as one ,   Keynesian economic theory has played an important role in the economic philosophy of modern American liberals . Modern American liberals generally believe that national prosperity requires government management of the macroeconomy , in order to keep unemployment low , inflation in check , and growth high . They also value institutions that defend against economic inequality . In The Conscience of a Liberal Paul Krugman writes : `` I believe in a relatively equal society , supported by institutions that limit extremes of wealth and poverty . I believe in democracy , civil liberties , and the rule of law . That makes me a liberal , and I 'm proud of it . '' Liberals often point to the widespread prosperity enjoyed under a mixed economy in the years since World War II . They believe liberty exists when access to necessities like health care and economic opportunity are available to all , and they champion the protection of the environment .   Modern American liberalism is typically associated with the Democratic Party , as modern American conservatism is typically associated with the Republican Party .