What democratic republican principle was violated by the louisiana purchase? agrarian foundation of the republic not incurring additional international obligations before the country was firmly established keeping the government small strict construction of the constitution?

The Democratic Republican principle that was violated by the Louisiana Purchase is the strict construction of the constitution.

To add, the Louisiana Purchase (1803) was a land deal between the United States and France, where U.S. obtained roughly 827,000 square miles of land west of the Mississippi River for $15 million.