Let me guess...Trump didn't talk like this hours before in Mexico. Does he not know that TV coverage is available in both countries?
You really weren't paying attention then, were you?
To be fair, he had to say that. His fellow Mexicans are not happy with his invitation to bring Trump to the country. But it's unlikely that having talked about the wall - which Trump admits they did - the subject of who'd pay didn't come up, since that's Trump's big rallying cry.
The whole thing is ridiculous. Peña let his people down. But I'm pretty sure he knows if he allocated any money to pay for a border wall, he'd be torn unceremoniously from his perch by an angry mob.
...but hey, do what you want...you will anyway.