I'm pretty sure it's the national road
Answer:
what it was: On 2 May 1803, U.S. Supreme Court Justice Samuel Chase delivered a charge to a Baltimore grand jury in which he blasted Congress and the Jefferson administration for repealing the Judiciary Act of 1801 and thus unseating federal circuit court judges.
significance: The conventional wisdom regarding the outcome of Chase's impeachment—the only such proceeding ever brought against a U.S. Supreme Court justice—is that it showed that a judge could not be removed simply for taking politically unpopular positions.
Explanation: