Mexico is such an important problem. The Mexican government's policies are pushing migration north... There isn't any sensible approach except to do what we need to do simultaneously. Secure our border — with technology, personnel, physical barriers if necessary in some places. We need to have tough employer sanctions, incentivize Mexico to do more.

Council on Foreign Relations speech in 2006 (video), quoted in "Hillary Clinton In 2006: 'Secure Our Border With… Physical Barriers'" by Gerry Urbanek, Western Journalism (10 June 2016).