With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Similar to the law of Canada, the U.S. law (27 CFR 5.22 (g)) says that tequila must be "manufactured in Mexico in compliance with the laws of Mexico regulating the manufacture of Tequila for consumption in that country". The sale of tequila at anything less than 80 proof (or 40% alcohol by volume) is not legal in the United States.
text_B: If an imported Mexican tequila that had the generally-accepted 40% alcohol content was already popular in the United States, could the company selling it here legally try to offer a flavored version that was still offered as tequila, knowing that any extra ingredients would, by necessity, somewhat dilute the base spirit?
NO.