What was the response of the US when Texas applied for statehood?

When Texas applied for statehood in 1845, the U.S. government initially approached the situation with caution due to concerns over the potential expansion of slavery and the implications for relations with Mexico, which still considered Texas its territory. Despite these concerns, Texas was admitted as the 28th state on December 29, 1845. This move contributed to heightened tensions between the U.S. and Mexico, ultimately leading to the Mexican-American War.