From CQ Homeland Security:

Border security, by some yardsticks, has come a long way in the past decade. The United States has spent at least $100 billion in its name, to the point where it now eclipses all other federal law enforcement spending. The Border Patrol has doubled in size to more than 21,000 agents. Apprehension of illegal immigrants recently fell to a 40-year low.

“Our borders and ports are stronger, more efficient and better protected than ever before,” Homeland Security Secretary Janet Napolitano said last week. Yet many Republicans remain unconvinced.