William Howard Taft was the 27th U.S. president (1909-1913), a Progressive Era Republican known for aggressive trust-busting and Dollar Diplomacy, whose split with Theodore Roosevelt fractured the Republican Party in 1912; he later became the only president to also serve as Chief Justice of the United States.
William Howard Taft was Theodore Roosevelt's handpicked successor, elected in 1908 and serving one term from 1909 to 1913. On paper he was a loyal progressive. His administration filed more antitrust suits in four years than Roosevelt's did in nearly eight, and the 16th Amendment (federal income tax) was proposed during his presidency. But Taft was a cautious lawyer where Roosevelt was a crusader, and missteps like signing the high Payne-Aldrich Tariff and firing conservationist Gifford Pinchot convinced progressives he had betrayed the cause.
Abroad, Taft replaced Roosevelt's "Big Stick" with Dollar Diplomacy, the idea that American investment in Latin America and East Asia could buy stability and influence without sending the military first. By 1912 the rift with Roosevelt was open warfare. Roosevelt ran against him on the Bull Moose (Progressive) ticket, the Republican vote split, and Democrat Woodrow Wilson won the White House. Taft got the last word in 1921 when he became Chief Justice of the United States, the only person ever to lead both the executive and judicial branches.
Taft's core content lives in Period 7 (1890-1945), where the Progressive Era and American expansion abroad dominate the exam. He's your go-to evidence for two big arguments. First, that progressivism wasn't one unified movement (Taft and Roosevelt were both "progressives" who ended up running against each other). Second, that the federal government's reach over the economy and the world was growing fast in the early 1900s. That second thread runs all the way to Unit 8. Topic 8.1 (APUSH 8.1.A) asks you to explain the context for the U.S. asserting global leadership after 1945, and Dollar Diplomacy is one of the early precedents for the idea that American economic power could shape the world order, a strategy the U.S. scaled up enormously during the Cold War.
Keep studying APUSH Unit 8
Dollar Diplomacy (Unit 7)
This is Taft's signature foreign policy. Instead of gunboats, use American bank loans and investments to gain influence in places like Nicaragua and China. Think of it as imperialism with a checkbook instead of a battleship.
Progressivism (Unit 7)
Taft proves progressivism was a coalition, not a single platform. He pushed real reforms (trust-busting, the income tax amendment) while alienating progressives on tariffs and conservation, which is exactly the kind of internal-tension evidence Period 7 essays reward.
Trust-Busting (Unit 7)
Taft actually out-busted the famous trust-buster, filing more antitrust suits in one term than Roosevelt did in nearly two. His suit against U.S. Steel even targeted a deal Roosevelt had personally approved, which helped poison their friendship.
U.S. as a Global Leader (Unit 8)
Topic 8.1's Cold War context, where the U.S. builds a free-market global economy to counter Soviet influence, is Dollar Diplomacy's strategy on a massive scale. Taft is useful continuity evidence that economic power as foreign policy didn't start in 1945.
Taft shows up most often in multiple-choice and SAQ questions about the Progressive Era and early-20th-century foreign policy. Expect stems comparing presidential approaches to reform (Roosevelt vs. Taft vs. Wilson) or to expansion (Big Stick vs. Dollar Diplomacy vs. Moral Diplomacy). The 1912 election is a classic prompt about political party fragmentation. No released FRQ requires Taft by name, but he's strong evidence for continuity-and-change essays on federal power over the economy or U.S. involvement abroad, including DBQs that stretch from the Progressive Era into the Cold War. The move that earns points is being specific. Don't just say "Taft was a progressive." Say what he did (antitrust suits, 16th Amendment, Dollar Diplomacy) and why progressives still turned on him.
They're easy to blur because Roosevelt chose Taft as his successor and both count as progressive Republicans. The difference is style and scope. Roosevelt treated the presidency as a bully pulpit and acted boldly, while Taft was a legalist who moved through the courts and Congress. On foreign policy, Roosevelt's Big Stick relied on military presence; Taft's Dollar Diplomacy relied on investment. Their break produced the 1912 three-way race, where Roosevelt's Bull Moose run split the Republican vote and handed Wilson the presidency.
William Taft was the 27th president (1909-1913), elected as Theodore Roosevelt's chosen successor and progressive heir.
Taft's administration filed more antitrust suits in one term than Roosevelt did in nearly two, and the 16th Amendment authorizing a federal income tax was proposed under him.
His foreign policy, Dollar Diplomacy, used American loans and investment in Latin America and East Asia to extend U.S. influence without leading with military force.
The Payne-Aldrich Tariff and the firing of conservationist Gifford Pinchot turned progressives against Taft and triggered his split with Roosevelt.
Roosevelt's 1912 Bull Moose challenge split the Republican vote, letting Woodrow Wilson win, which makes the 1912 election the textbook example of party fragmentation.
Taft later served as Chief Justice of the United States (starting in 1921), making him the only person to head both the executive and judicial branches.
Taft (1909-1913) aggressively prosecuted trusts under the Sherman Antitrust Act, oversaw the proposal of the 16th Amendment (federal income tax), and pursued Dollar Diplomacy abroad. He also signed the Payne-Aldrich Tariff and fired Gifford Pinchot, two moves that cost him progressive support.
Not by the numbers. Taft actually filed more antitrust suits in four years than Roosevelt did in nearly eight. He got the anti-progressive label because of his cautious style, the high Payne-Aldrich Tariff, and the Ballinger-Pinchot conservation controversy, not because he stopped reforming.
Big Stick diplomacy led with military power and the threat of intervention, like Roosevelt's role in Panama. Dollar Diplomacy led with money, encouraging American banks to invest in Latin America and East Asia so economic dependence would do the work of warships.
Roosevelt believed Taft had abandoned progressive reform, especially after the tariff and conservation fights, so he ran on the new Progressive (Bull Moose) ticket. The split Republican vote let Democrat Woodrow Wilson win the presidency.
Yes. Taft became Chief Justice of the United States in 1921, eight years after leaving the White House, making him the only person to serve as both president and Chief Justice. He reportedly considered it the greater honor.