Conversation so far:
what were two obstacles to texas becoming a state
Mexico wanted to keep Texas, and Martin Van Buren feared it would cause war. He also didn't want to add a new state to the Union that allowed slavery.
why was martin van buren against texas annexation
Martin Van Buren viewed Texas annexation as an immense political liability that would empower the anti-slavery northern Whig opposition.

Question: when did the state become admitted
Self-contained rewrite: when did Texas become admitted into the US as a state