You can choose to 'believe' it if you like... some people even believe in big foot. But the evidence is quite to the contrary. Andrew Jackson was president during the Texas War of Independence. He strongly supported annexation of Texas and was of his first efforts when he took office was making an offer to buy Texas from Mexico. The Mexicans flatly rejected that offer.
Sam Houston and Andrew Jackson were close friends. Houston actually named his son Andrew Jackson Houston in honor of his friend. Would he have done that if Jackson had been aiding Santa Anna?
Here's a quote from History.com
During the course of the Mexican revolt, the United States was far from neutral. Public opinion openly favored Texan independence and the government actually sent a military force onto Texan soil, weakly explaining that the soldiers were needed to restrain local Indians from raiding American settlements across the border.In the fall of 1836, Samuel Houston was inaugurated as president of the independent Republic of Texas. The new administration promptly sent a representative to Washington, and repealed the prohibition on slavery. Andrew Jackson believed that Texas should be admitted to the Union as a slave state, but withheld action out of fear of the political consequences. On his final day in office, Jackson extended official diplomatic recognition to independent Texas.
Now if you have some source that the US supported Mexico and not the Texans during that war, I sure love to see it ... but I guess I would love to see a Big Foot too. ;~))
I just don't 'believe' either exist.
I hear what you are saying....However how do you explain the presence of Mexican government officials on a US flagged ship, and Gunpowder ending up headed for a bay where a Texas ship had previously in the day sunk a Mexican warship?