by may 1837, Columbia Texas (the new Capital) held 1500 people!
The Mexicans proceeded being a threat, even after the war and the treaty of Velasco (that Mexico gladly rejected). Comanche and other partners raided Texas settlements. They also interrupted trade and many settlers were frightened.
Not to mention the pile debt that Texas was in. Texas had only little to support the government with many failed loans.
He had an anxious military with more US soldiers arriving as well.
Lamar and Houston disagreed with many things. One of the main things was the different policies in and out of the country. A foreign policy is the way the government deals with other countries.