All terms in this list:

Progressive: Of or pertaining to such a party, its policies, or its membership.

Muckrakers: to search for and expose real or alleged corruption, scandal, or the like, especially in politics.

Trustbusters: a person or agency employed to enforce antitrust legislation.

IDA Tarbell: one of the leading "muckrakers" of the progressive era

Triangle shirtwaist factory: one of the deadliest industrial disasters in the history of the city, and resulted in the fourth highest loss of life from an industrial accident in U.S. history.

The Jungle: novel to portray the lives of immigrants in the United States in Chicago and similar industrialized cities.

Niagara movement: a black civil rights organization founded in 1905 by a group led by W. E. B. Du Bois and William Monroe Trotter.

W Wilson: Thomas Woodrow Wilson was the 28th President of the United States, in office from 1913 to 1921

Du Bois: civil rights leader and political activist who campaigned for equality for Black Americans

Booker T. Washington: an African-American educator, author, orator, and advisor to presidents of the United States

Pure food and drug act: law passed in 1906 to remove harmful and misrepresented foods and drugs from the market and regulate the manufacture and sale of drugs and food involved in interstate trade.

Recall: To call back, bring back or summon to a specific place, station etc.

Referendum: A direct popular vote on a proposed law or constitutional amendment

Initiative: A new development; a fresh approach to something; a new way of dealing with a problem.

Robert la follette: an American Republican politician.

Suffrage: A vote in deciding a particular question.

NAACP: National Association for the Advancement of Colored People

Ballinger- Pinchot disagreement: dispute between U.S. Forest Service Chief Gifford Pinchot and U.S. Secretary of the Interior Richard Achilles Ballinger that contributed to the split of the Republican Party before the 1912 Presidential Election

Bull moose party: an American political party

Pulitzer: U.S. journalist and publisher,

Hearst: an American newspaper publisher who built the nation’s largest newspaper chain and whose methods profoundly influenced American journalism.

Dewy: Having the quality of bearing droplets of water.

Yellow journalism: Journalism which is sensationalistic and of questionable accuracy and taste.

Imperialism: The policy of forcefully extending a nation's authority by territorial gain or by the establishment of economic and political dominance over other nations.

Maine: A slogan of the Spanish-American War

Rough riders: a person who breaks in or can ride unbroken horses.

T. Roosevelt: 26th President of the United States; hero of the Spanish-American War; Panama Canal was built during his administration

Teller Amendment: joint resolution of the United States Congress, enacted on April 20, 1898, in reply to President William McKinley's War Message

Platt amendment: stipulated the conditions for the withdrawal of United States troops remaining in Cuba at the end of the Spanish-American War and defined the terms of Cuban-U.S. relations.

Boxer rebellion: supported peasant uprising of 1900 that attempted to drive all foreigners from China

Open door policy: term in foreign affairs initially used to refer to the United States policy in the late 19th century and early 20th century outlined in Secretary of State John Hay's Open Door Note, dispatched in 1899 to his European counterparts.

Dollar diplomacy: The use of a country's financial power to extend its international influence.

Roosevelt corollary: asserting that the U.S. might intervene in the affairs of an American republic threatened with seizure or intervention by a European country.

Liliuokalani: was the last monarch and only queen regnant of the Kingdom of Hawaii.

Pancho villa: one of the most prominent Mexican Revolutionary generals

Great white fleet: the popular nickname for the United States Navy battle fleet that completed a circumnavigation of the globe from 16 December 1907 to 22 February 1909 by order of U.S. President Theodore Roosevelt

Big stick diplomacy: International negotiations backed by the threat of force.