[Illegal immigration] costs the taxpayers of the United States a lot of money. And it's unfair to Americans who are working every day to pay their own bills. It's also unfair to a lot of people who have waited in line for years and years in other countries to be legal immigrants.

The Constitution is a radical document... it is the job of the government to rein in people's rights.

In a world with no systems, with chaos, everything becomes a guerilla struggle, and this predictability is not there. And it becomes almost impossible to save lives, educate kids, develop economies, whatever.

If you believe in making change from the bottom up, if you believe the measure of change is how many people's lives are better, you know it's hard and some people think it's boring. Speeches like this are fun, actually doing the work is hard.

In the emerging global economy, everything is mobile: capital, factories, even entire industries. The only resource that's really rooted in a nation--and the ultimate source of all its wealth--is its people.

If a President of the United States ever lied to the American people, he should resign.

Let me say this as clearly as I can: No matter how sharp a grievance or how deep a hurt, there is no justification for killing innocents.