Texas had their hands full dealing with the Comanches raiding their settlements.
Also Texas's attempt to gain control of Northern New Mexico was a disaster.
"The
Texan Santa Fe Expedition was a commercial and military expedition to secure the
Republic of Texas's claims to parts of Northern
New Mexico for
Texas in 1841.
[1][2] The expedition was unofficially initiated by the then President of Texas,
Mirabeau B. Lamar, in an attempt to gain control over the lucrative
Santa Fe Trail and further develop the trade links between Texas and New Mexico. The initiative was a major component of Lamar's ambitious plan to turn the fledgling republic into a continental power, which the President believed had to be achieved as quickly as possible to stave off the growing movement demanding the
annexation of Texas to the
United States. Lamar's administration had already started courting the New Mexicans, sending out a commissioner in 1840, and many Texans thought that they might be favorable to the idea of joining the Republic of Texas.
The expedition finally arrived in New Mexico in mid-September 1841. Several of their scouts were captured, including Capt. William G. Lewis. Having expected to be welcomed on their arrival, the expedition was surprised to be met by a detachment from the Mexican Army of about 1500 men sent out by the governor of New Mexico,
Manuel Armijo. One of Armijo's relatives who spoke English, probably
Manuel Chaves or
Mariano Chaves, parleyed with the Texans, with Captain Lewis supporting his statements. Both said that Armijo would give the Texans safe conduct and an escort to the border, and Lewis swore to it "on his
Masonic faith".
[3] After the Texans' arduous journey, they were in no state to fight a force that outnumbered them so heavily, so they surrendered. The New Mexicans gave them some supplies. "
I do not see Texas being able to expand.