Not nearly enough.
IMHO, part of the problem is that construction should have been going on since the 90s. 2000 miles is a LOT of wall.
See here:
http://www.freerepublic.com/focus/f-news/3734926/posts
“...construction should have been going on since the 90s...
Clinton, Bush, and Obama sure weren’t going to build any wall...
I wish President Eisenhower had built it in the 1950’s.