Question

after texas gained its independence from mexico in 1836, it remained an independent nation, the republic of texas, for nearly 10 years. why did annexation to the u.s. take so long?

Answer 1

The reason it took so long was because of political divisions over slavery, The US congress feared that ratifying the Tyler Texas Treaty in 1844 would cause a war with Mexico and increase tensions in the US over slavery in the west.