Presidents Andrew Jackson and Martin Van Buren rejected adding Texas to the United States because:

a. The population of Texas was too small to justify it.

b. The Mexican army's resounding victory at the Alamo made them fearful of antagonizing a powerful government.

c. Henry Clay wanted to add it and, as the Whig leader, he was their sworn enemy.

d. The presence of slaves there would reignite the issue of slavery.