Answer:
The Statehood of Texas.
Step-by-step explanation:
The Statehood of Texas in 1845 faced many contentions from several political individuals and organizations. When Texas was annexed into the U.S Constitution, the abolitionists in the country worried that inclusion of another major slave-holding state would empower the pro-slavery movement, so they opposed the annexation.
Mexico, which already had several border conflicts with Texas by this time, did not support the annexation because it did not want any future strife. Also, President Martin Van Buren did not believe that it was a wise move at the time because of political instabilities in the North.
However, President Tyler fought for and supported the annexation because he wanted to gain political support from both pro-slavery states and anti-abolitionists. Therefore, the answer is the Statehood of Texas.