I think the Democrats are going to have to be willing to give up, maybe, some short-term political gain by whipping up fears on some of these things - if it's a reasonable Social Security proposal, a reasonable Medicare proposal. We've got to deal with these things. You cannot have health care devour the economy.

Only astrophysicists new about the Internet 20 years ago. Today my cat has a website.

Constant conflict is actually often good politics. Because the more you can inflame your supporters the more likely they are to show up at election day. And if they're more inflamed than the other side, even if the other side has more people agreeing with it, you'll win, because your crowd will show up.

[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.

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.

When I was in England, I experimented with marijuana a time or two, and I didn’t like it, and I didn’t inhale, and I never tried again.

It is a commonplace of American life that immigrants have made our country great and continue to make a very important contribution to the fabric of American life. But...under the pressures we face today, we can't afford to lose control of our borders, or to take on new financial burdens, at a time when we are not adequately providing for the jobs, the health care, and the education of our own people. Therefore, immigration must be a priority for this administration.