Our country was founded on immigration. We are all occupying Native American land here. At what point do we say 'It's our land, and nobody else can come here.'

In my view, our immigration policy means that we have some people who can come into this country - who we might want to say no to - and others, who we might want to attract, who can't currently come in.

If we do not change our negative habits toward climate change, we can count on worldwide disruptions in food production, resulting in mass migration, refugee crises and increased conflict over scarce natural resources like water and farm land. This is a recipe for major security problems.

America is the greatest country on Earth - and when people vote with their feet, they come here.

People tend to forget that in our country, we'd pretty much all be immigrants, except for the Native Americans.

San Francisco has always been a haven for misfits and weirdos. I'm both of those, which is why I came here.