James K. Polk Signs The Texas Annexation Bill

Under U.S. President John Tyler, Texas was offered admission to the Union as a state.

The bill was signed into law on March 1, 1845. It was ratified by Texas on July 4. Texas became the 28th state on December 29, a law signed by President James K. Polk.

President Tyler despised Polk, both as a person and politician. Upon hearing of Polk's election to office, Tyler urged Congress to pass a joint resolution admitting Texas to the Union; Congress complied on February 28, 1845. This was a backhanded slap at Polk; it took away Polk's most desired presidential action. Polk's whole campaign was based upon the tenet of annexing Texas. Now, Polk could not. Texas promptly accepted the offer and officially became a state on December 29, 1845. The annexation angered Mexico, which had lost Texas in 1836. Mexican politicians had repeatedly warned that annexation would lead to war.