The term American Empire was popularized during which U.S. president's tenure?

• A. Andrew Jackson
• B. James K. Polk
• C. Thomas Jefferson
• D. Abraham Lincoln

Answer: (B)

The idea being tested is how expansion and imperial language took hold during a presidency known for bold territorial growth. James K. Polk, who served from 1845 to 1849, is the figure most closely linked to popularizing the term American Empire because his administration aggressively expanded U.S. territory. He pushed for the annexation of Texas, secured the Oregon boundary, and led the country into the Mexican-American War, which produced the vast Mexican Cession (what is now California, Nevada, Utah, Arizona, New Mexico, and more). Those rapid territorial gains fueled debates about a continental—indeed, imperial—reach for the United States, and observers frequently described the era in terms of an American empire in the making. Other presidents contributed to expansion in their own ways, but Polk’s aggressive acquisitions and the war that followed are the moments most associated with that label.