Republicans immediately fired back against President Obama after he claimed Tuesday that the U.S. border with Mexico has improved since he took office.

Obama made the comment during his first trip to the U.S.-Mexico border as commander-in-chief, where he called on Congress to pass sweeping legislation that would remake the nation's immigration system.

Countering Republican calls to focus on border security before moving to a comprehensive overhaul, Obama said in his speech to an enthusiastic crowd in the politically unfriendly territory of El Paso, Texas, that their demands have been more than met by his administration but "they'll never be satisfied"...