What used to be racial segregation now mirrors itself in class segregation, this great sorting (has) taken place. It creates its own politics. There are some communities where not only do I not know poor people, I don't even know people who have trouble paying the bills at the end of the month. I just don't know those people. And so there's less sense of investment in those children.

We have to uphold a free press and freedom of speech - because, in the end, lies and misinformation are no match for the truth.

The Iranian regime supports violent extremists and challenges us across the region. It pursues a nuclear capability that could spark a dangerous arms race and raise the prospect of a transfer of nuclear know-how to terrorists. Its president denies the Holocaust and threatens to wipe Israel off the map. The danger from Iran is grave, it is real.

We have to be successful at the cutting-edge industries of the future like Twitter. But we also have always been a country that makes stuff.

One of the things that you learn, having been in this [President's] office for four years, is the old adage of Abraham Lincoln's. That with public opinion there's nothing you can't do and without public opinion there's very little you can get done.

Unfortunately, you've grown up hearing voices that incessantly warn of government as nothing more than some separate, sinister entity that's at the root of all our problems. Some of these same voices also do their best to gum up the works. They'll warn that tyranny is always lurking just around the corner. You should reject these voices.

Throughout history, Islam has demonstrated through words and deeds the possibilities of religious tolerance and racial equality.