The thing is all politicians lie...this isnt breaking news.
For instance, while forcing Obamacare on people, Obama said...""If you like the plan you have, you can keep it. If you like the doctor you have, you can keep your doctor, too. The only change you’ll see are falling costs as our reforms take hold."
I think that was touted as the lie of the year.
Playing devils advocates, he did make the comment and pledge that Mexico would pay for it before he was elected. He did "try" and make them pay for it. So technically it might not be a lie, just a promise he couldn't follow thru on. The spin afterwards was worse then the pledge. Just admit you couldnt get them to pay for it...but yeah, he is often full of shit like I said earlier.