The United States must lead the world in reversing climate change. We can do that.

I know that virtually every member of the Senate understands we just cannot turn our back on men and women who have put their lives on the line to defend us and who are hurting today.

What we're also looking at, if we do not transform our energy system, is more international war and conflict as countries fight over limited natural resources, including water and land to grow their crops.

Do not tell me that I have not shown courage in standing up to the gun people, in voting to ban assault weapons, voting for instant background checks, voting to end the gun show loophole and now in a position to create a consensus in America on gun safety.

Establishing a 0.03 percent Wall Street speculation fee, similar to what we had from 1914-1966, would dampen the dangerous level of speculation and gambling on Wall Street, encourage the financial sector to invest in the productive economy and reduce the deficit by more than $350 billion over 10 years.

As a result of the digital age and the decline of first-class mail, there is no question that the Postal Service must change and develop a new business model.

When the average Social Security benefit is $1328 a month, and more than one-third of our senior citizens rely on Social Security for Virtually all of their income, our job is to expand benefits, not cut them.