is no record of any president violating or changing the Texas Constitution. As the United States and other countries such as France recognized Texan independence, presidential power functioned without interference from the outside world, though the Republic generally allied itself informally with the United States. Several presidents supported annexation of the republic by the United States, with direct admission as a state. Under the Constitution the vice president was to succeed the president in the event of the latter's death, resignation or removal by impeachment; however this never happened. The vice president was also the president of the Senate, and had a casting vote in the event of a tie. Oath of office The oath or affirmation of office for the president was established in the Constitution of the Republic of Texas and was mandatory for a president 'before entering upon the duties' of the office. The wording, very similar to that of the United States' version, was prescribed by Article VI of the Constitution, as follows: List of presidents and vice presidents References External links Constitution of the Republic, 1836 from Gammel's Laws of Texas, Vol. I. hosted by the Portal to Texas History. Lists of Texas politicians Texas Republic of Texas es:República de Texas