'Ludicrous': Trump's Border Wall Would Cost Billions

Constructing an impassable wall along the U.S.-Mexico border would be a tall order — even for master real estate developer and 2016 GOP presidential candidate Donald Trump. Eric Olson, associate director of the Latin American program at the non-partisan Wilson Center said,
"From a security standpoint, it really is not an intelligent solution."
In fact, "it's ludicrous," Olson said of the idea, which has become a hallmark of Trump's campaign.