American expansionism under Donald Trump

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Donald Trump, the current president of the United States since 2025, has proposed various plans and ideas in the lead-up to and since his second inauguration that would expand the United States' political influence and territory.^[1] In his second inauguration speech, Trump directly referenced the potential territorial expansion of the United States and became first president to use the phrase manifest destiny during an inaugural address.^[2][3] The last territory acquired by the United States came in 1947 with the acquisition of the Mariana, Caroline, and Marshall Islands, with the latter having regained its independence around 40 years later.

Since being elected, Trump has said at various points that he wants to annex Canada, Greenland, and the Panama Canal. He has also suggested invading Venezuela, annexing Mexico and taking over the Gaza Strip. Trump's determination to treat the Western Hemisphere as a U.S. sphere of influence has been characterized as a revival of the Monroe Doctrine.^[4][5]

According to a February 2025 poll by YouGov, only 4% of Americans support American expansion if it requires military force, 33% of Americans support expansion without the use of military or economic force, and 48% of Americans oppose expansion all together.^[6]