The phenomenal generosity of the United States in its aid budget towards health issues is the best in the world. You can look at that broadly, you can look at it in terms of HIV, the PEPFAR money which came together in a Republican administration with bipartisan support.

Software is the magic thing whose importance only goes up over time.

Legacy is a stupid thing! I don't want a legacy.

Don’t tax my income, tax my consumption.

I think any statement about stock prices is always suspect unless it's made by Warren Buffett.

The only definition by which Americas best days are behind it is on a purely relative basis.

With polio, we've gone several years with no polio in all of Africa, but now with this we're having to go and mop up in that whole region, so it's a bit of a setback for polio. So in parallel we have to go back and get rid of those cases.