I think when you have megalomania and a delusional mindset, lying is perfectly okay:
It’s a good story, and the immigration fight tells us a lot about Cruz. But the fight didn’t happen the way he says it did. Cruz didn’t marshal the opposition or even take a firm stand. He’s a lawyer, not a leader. He chose his words exquisitely so that down the road—say, in a future campaign for president—he could position himself on either side of the immigration debate. And he delivered, with angelic piety, speeches that he now claims were lies.