"It is true that there are areas of the border that are enforceable and where security has improved, but the security along the entire U.S.-Mexico border is nowhere near sufficient," he wrote. "To emphasize this fact, Members of Congress must see the realities of the border for themselves, as well as observe firsthand what enforcement resources actually work."

Hunter suggested that a visit to San Diego County would let members see enforcement tools that work. "More than 14 miles of double-layered fencing, equipped with technology and separated by roads for U.S. Border Patrol and security vehicles, has been extremely effective in preventing and deterring illegal foot and vehicle traffic," he wrote.

Hunter said a visit to San Diego County would help inform members rather than "misleading pronouncements."

"As the House continues its discussion on legislation to overhaul our nation's immigration laws, I encourage Members of Congress to visit San Diego through official means to experience the border first-hand and assess the high value of leveraging infrastructure, technology and personnel to achieve an enforceable Southwest border," he wrote.

While the Senate continues to work on a bill that would help 11 million illegal residents gain legal status, the House this week will advance a bill aimed at strengthening border security, seen as a GOP priority for any immigration bill.

On Tuesday, the House Judiciary Committee will mark up the Strengthen and Fortify Enforcement (SAFE) Act, H.R. 2278.