U.S. companies earn more from their investments in the EU than in the rest of the world combined.

The E.U. is more than just a trade organization or a common market; it is a guarantee of democracy, freedom, justice, and human rights. Nations cannot stay in the E.U. if they do not respect these guarantees.

One cannot have economic growth without security.

The E.U. has moved to combat global terrorism by instituting common European arrest and evidence warrants and creating a joint situation center to pool and analyze intelligence.

U.S. companies rely on the European market for more than half of their global foreign profits.

David Cameron says he wants to keep Britain in the EU, but his tactics are so divisive that, if he gets what he wants it will be at the price of huge ill-will in Europe; or if he doesn't, it will be at the price of increased anti-EU sentiment in his own party and in British society.

Proliferation of nuclear weapons to terrorist organisations is far more dangerous than proliferation of nuclear weapons to states, even states like North Korea.