Final answer:
The Haitian Revolution increased American interest in territorial expansion due to fears of slave rebellions and the opening opportunity to purchase the Louisiana territory after France's plans were disrupted, which also brought slavery's expansion to national debate.
Step-by-step explanation:
The Haitian Revolution might have caused some Americans to be more interested in expanding America's territory for several reasons. The uprising in Haiti inspired fear among American slaveholders that similar slave rebellions could happen in the United States, emphasizing the importance of controlling more territory to potentially disperse the slave population. Additionally, the revolution in Haiti ended France's plans to expand in the Americas, leading to the Louisiana Purchase at a lower price, which doubled the size of the United States and further sparked the debate on slavery's expansion.
Moreover, the success of the Haitian Revolution marked an important moment in the sectional crisis, creating clear zones of freedom and un-freedom and shattering the assumption that African-descended slaves could not also be rulers. This increased the urgency among white Americans to solidify their own territories and governance structures. It also raised questions about the role of slavery in the United States, wondering if its dispersion and the halting of the external slave trade could maintain the country as a Republic dominated by white ownership and potentially lead to the end of slavery.