Jordan must be highly vigilant in its fight against ISIS, especially if it wants to continue playing such a critical role within the coalition. Even though ISIS has not launched a thorough offensive against Jordan, the writing is already on the wall.

Donald Trump has made building a wall with Mexico the centerpiece of his campaign. Yet America's attempt to build a wall under the Bush Administration has given us some idea about how much such an endeavor would cost.

The American and Mexican communities that live at the border are united by common geography, history, language, and aspirations, and have much to teach the rest of the country about how to build harmonious bicultural communities.