Thomas Jefferson used a loose interpretation of the United States constitution when he

Thomas Jefferson had a strong belief about how the Federal Government's powers should be interpreted strictly, but had a loose interpretation of the Louisiana Purchase.

The Louisiana Purchase meant an expansion of presidential power. Jefferson supported Aaron Burr's conviction for treason, but Burr was acquitted because the court found no over act which was necessary to commit treason, the only crime defined in the American Constitution.

He wrote that every generation should have the opportunity to update the Constitution every 19 or 20 years.