Answer:The issue behind Texas annexation was slavery. According to the Missouri Compromise of 1820, Texas should have been able to come in as a slave state since it was south of Missouri; however, since there was no free state to come in with it, this would have led to an imbalance in the Senate during a time when the United States government was having trouble keeping slaveholders and abolitionists happy. Texas would have to wait for nine years before achieving statehood.
There was also the issue of provoking a war with Mexico.
Step-by-step explanation:
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