1. Annexation was a founding political objective, not a last-minute decision
In the first national election after independence, Texans voted overwhelmingly to seek annexation to the United States. Many settlers had cultural, economic and family ties to the United States, and leaders such as Sam Houston viewed annexation as a way to obtain stronger military security, access to U.S. markets and a stable constitutional future. The Republic's leaders therefore began pursuing annexation almost as soon as the new government was organized.
But independence created international complications. Mexico rejected the loss of Texas. The United States had diplomatic obligations and feared war with Mexico. Domestic U.S. politics also revolved around slavery and the balance between free and slave states. Annexing a large slaveholding republic could alter that balance and intensify sectional conflict. These concerns explain why U.S. recognition in 1837 did not automatically lead to admission.
2. The failure of the first annexation effort forced Texas to behave like a permanent nation
Texas formally presented annexation to the United States in August 1837. The proposal stalled. Houston ultimately instructed Anson Jones to withdraw the offer, and the Texas Senate approved that withdrawal in January 1839. For the next several years, Texas expanded its diplomacy in Europe, sought trade treaties and attempted to establish enough international legitimacy to survive without joining the Union.
Mirabeau Lamar's administration was especially associated with the vision of a permanently independent Texas. Houston's return to office in 1841 brought annexation back toward the center of strategy, but the intervening years changed the bargaining environment. France, Britain and other powers had developed relations with Texas. Their interest in an independent republic gave Texas alternatives and also made U.S. expansionists more concerned that delay could permanently pull Texas into a European commercial orbit.
3. The 1844 treaty failed because annexation was entangled with U.S. national politics
Texas and the United States signed an annexation treaty on April 11, 1844. Treaties require a two-thirds vote in the U.S. Senate, and the proposal failed 35 to 16 on June 8. The defeat did not end the issue. Instead, annexation became a major part of the 1844 presidential campaign, where James K. Polk represented an expansionist Democratic position and Henry Clay's Whig candidacy treated annexation much more cautiously.
Polk's victory changed the political momentum, but outgoing President John Tyler moved before Polk took office. Annexation supporters shifted from a treaty to a joint resolution, which required simple majorities in both houses of Congress. The House and Senate passed the measure in early 1845, and Tyler signed it on March 1. The change in legal vehicle was decisive: the same policy that could not command a two-thirds Senate treaty vote could pass through ordinary congressional majorities.
4. Texas still had to choose between annexation and continued independence
The U.S. offer did not instantly end the Republic. President Anson Jones had been pursuing a parallel strategy in which Britain and France encouraged Mexico to recognize Texas independence if Texas would stay out of the United States. By May 1845, a proposed Mexican settlement offered recognition under that condition. Jones wanted the Texas government to see both options before making an irrevocable choice.
The choice proved politically lopsided. The Texas Congress met in June and accepted the U.S. proposal. A popularly elected convention met in Austin and approved annexation on July 4 while drafting a state constitution. The annexation ordinance and constitution then went to Texas voters. The Texas State Library's compiled totals show overwhelming approval. The decision was therefore expressed through several layers of republican government—Congress, convention and popular vote—rather than a single executive agreement.
5. Statehood occurred in two stages: legal admission and the practical transfer of government
The United States Congress approved the final admission measures, and President Polk signed the resolution admitting Texas on December 29, 1845. That is the legal date Texas became the 28th state. The Republic's existing officers, however, could not simply disappear before the new state government was ready. Administrative continuity required a transition.
On February 19, 1846, J. Pinckney Henderson took the oath as the first governor of the State of Texas and Anson Jones formally closed the Republic government. Annexation terms allowed Texas to retain its public lands and its public debt rather than transferring those liabilities to the federal government. The transition therefore changed sovereignty but preserved important responsibilities and institutions. It also directly connected the Republic's fiscal history to later state land policy and the settlement of public debt.