Paul's desire to secure U.S. borders remains a key topic in his 2008 presidential campaign. He opposes the [[North American Union]] proposition and its proposed integration of Mexico, the United States of America, and Canada. Paul voted "yes" on the [[Secure Fence Act of 2006]], which authorizes the construction of an additional 700 miles of double-layered fencing between the U.S and Mexico. Paul opposes illegal immigration as well as amnesty for illegal immigrants. | Paul's desire to secure U.S. borders remains a key topic in his 2008 presidential campaign. He opposes the [[North American Union]] proposition and its proposed integration of Mexico, the United States of America, and Canada. Paul voted "yes" on the [[Secure Fence Act of 2006]], which authorizes the construction of an additional 700 miles of double-layered fencing between the U.S and Mexico. Paul opposes illegal immigration as well as amnesty for illegal immigrants. |