Inequality also distorts our democracy. It gives an outsized voice to the few who can afford high-priced lobbyists and unlimited campaign contributions, and runs the risk of selling out our democracy to the highest bidder. And it leaves everyone else rightly suspicious that the system in Washington is rigged against them - that our elected representatives aren't looking out for the interests of most Americans.

International inspectors are on the ground and Iran is being subjected to the most comprehensive, intrusive inspection regime ever negotiated to monitor a nuclear program. Inspectors will monitor Iran's key nuclear facilities 24 hours a day, 365 days a year. For decades to come, inspectors will have access to Iran's entire nuclear supply chain. In other words, if Iran tries to cheat - if they try to find build a bomb covertly, we will catch them.

The best way to not feel hopeless is to get up and do something.

We wouldn't even be where we are had it not been that 70% of Hispanics voted for President Obama, voted Democratic in the last election. That caused an epiphany in the Senate, that's for sure. So all of a sudden we have already passed comprehensive immigration reform in the Senate. That's a big victory.

We want our children to live in an America...that isn't threatened by the destructive power of a warming planet.

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.

My life story is something obviously that belongs to me very personally. And the fact of the matter is that I had choices and chances and opportunities that were provided to me, based on the way I was able to direct my own decision-making. And what I'm working to fight for is to make sure that all women have the ability to do that.