Politifact.com Truth-O-Meter rulings from National: Ted Cruz: "Ukraine voluntarily gave up its nuclear weapons because the United States of America" said it would "ensure (its) territorial integrity from Russia."

The subject of this fact-check...is the claim that American promises of territorial integrity led Ukraine to hand over those nukes. Former presidential hopeful Ben Carson made the same argument in the very first Republican debate. We rated it False then, and Cruz’s claim is no different.....
http://www.politifact.com/truth-o-meter/statements/2016/mar/23/ted-cruz/ted-cruz-wrongly-says-ukraine-gave-nukes-due-ameri/