Why was William Henry Harrison worried about tecumseh

He was very worried indeed.

Explanation:

William Henry Harrison became worried about the alliance that Tecumseh was building. ... Harrison's army defeated the Shawnee and burned down the city of Prophetstown. War of 1812. When the United States declared war on Great Britain on June 18, 1812, Tecumseh saw a golden opportunity.

classical republicanism, also known as civic humanism, is a form of republicanism  developed in the renaissance inspired by the governmental forms and writings of  classical  antiquity, especially such  classical  writers as aristotle, polybius, and cicero.

answer; i believe the correct answer is (federalist);