What states were a threat to the US national security in the 1800s?

In the 1800s, several states posed threats to U.S. national security, particularly during the period of westward expansion and the Mexican-American War. Mexico was a significant concern due to territorial disputes and the annexation of Texas, which led to heightened tensions and conflict. Additionally, Native American tribes often allied with foreign powers, such as Britain and Spain, posing challenges to U.S. expansion and sovereignty. Other regional powers, like Britain and France, also maintained interests in North America that could have threatened U.S. territorial integrity.