Tourist Driver License Missouri Where Does It Say That Legally A Tourist Mexican Citizen May Drive In Texas With A Mexico Drivers License?

Where does it say that legally a tourist Mexican citizen may drive in Texas with a Mexico drivers license? - tourist driver license missouri

I am a citizen of the United Mexican States to visit a valid driver's license in Mexico. In a tourist visa. Visit. For a few days. Recently, I received a letter from a soldier, "said no driver's license. Then, thousands of visitors pass illegal Mexicans in Texas, then, yes?
Whatever the answer I want to know "where it says that" certain laws (state? Federal Republic?) Behind him.