Did the U.S. Really Steal Mexican Lands? (A Latin American Perspective)

Yesterday the President of the Mexican Senate, leftist Gerardo Fernández Noroña, made the common claim that California, Colorado, Texas, etcetera were stolen from Mexico. That's state propaganda, a lie, and to make it worse for the commies, it's an imperialist lie. Find out why in the video below. I recorded in Spanish, but the subtitles are, if I may say so, excellent.