They (#ISIS) are going to be bombing American cities coming across from Mexico.

We seem to be our own worst enemies. We should require critical U.S. infrastructure to remain in U.S. hands.

A number of people who have supported me on the border fence in the U.S. have observed the fences in Israel and their effectiveness.

This century is going to be a very dangerous century.

They (#ISIS) are going to be bombing American cities coming across from Mexico.

In 2006, the Secure Fence Act was signed into law, requiring the Department of Homeland Security to build upward of 700 miles of double layered fencing along the U. S-Mexico border. While the Obama administration is quick to state that the targets have been met, only a small fraction - in fact, less than 40 miles - of the newly implemented infrastructure is double-layered.

The decision to leave [Iraq] should be based solely on the judgment of the combatant commanders on the ground who say, "My Iraqi counterparts can now handle this particular area of the country on their own with minimum American support or with no American support." When they can do that, we should leave.