"McCain, by contrast, is not nearly as convincing when he talks about economic issues as he is when talking about national security."

"Convincing" to whom? Oddly, numbered among Senator McCain's national security interests has never particularly been U.S. border security, which is something like running as an environmentalist while remaining mum on the environmentally devastating consequences of never-ending immigration-generated U.S. population doublings. No, wait, we already have that on the Democratic side.