Mark Ruffalo and Wenonah Hauter

While the broad narrative of President Obama's speech on climate change in June was something to rally around, his support for fracking threatens to exacerbate climate change to the point of no return, while poisoning our water, air and families in the process. Here's what we need to do.

Tony Newman

Director of Media Relations, Drug Policy Alliance

I've worked at the Drug Policy Alliance for 14 years -- and more people, even folks who don't follow drug policy, have asked me about the Sanjay Gupta special than almost anything else I've worked on over the past decade and a half.

Rachel Lavine

NYS Democratic Committeewoman, Downtown Manhattan

What's with all this talk of vaginas and Christine Quinn running for mayor anyway? What is it about the prospect of a vagina possibly sitting in the seat of power that has so many people -- even people with vaginas themselves -- all worked up?

Paul Stoller

Professor of Anthropology, West Chester University; Author, 'The Power of the Between'

As a society we seem to no longer place high value in scientific knowledge, intellectual excellence or, for that matter, artistic creativity -- three elements that have heretofore contributed to the greatness of our society. Can we get back on track?

Rev. Al Sharpton

President, National Action Network

As a new generation that grew up in the aftermath of the '60s movement, we've worked diligently to make Dr. King's dream a reality. But when jobs and justice are still key issues plaguing society today, we have no choice but to call on everyone to gather once again.

Dean Baker

Co-director, CEPR; author, 'The End of Loser Liberalism: Making Markets Progressive'

Summers had ample opportunity in his prior jobs to demonstrate a commitment to rein in the financial sector. All the evidence shows he pushed in the opposite direction. The Obama administration's effort to portray him as the frustrated regulator should not be taken seriously.

Daphne Eviatar

Senior Counsel, Law and Security Program, Human Rights First

It's amazing that 12 years after the September 11 terrorist attacks, the military commission at Guantanamo is still trying to figure out what is or isn't classified, how to handle it and the procedures for prosecutors to provide documents relevant to the case to defense lawyers.

Daniel Mach and Chandra Bhatnagar

No state should deny its residents the essential right to exercise their religion. No state should target or disfavor any faith. No state should engage in actions that contravene the requirements of the U.S. Constitution, and no state should seek to limit the independence of the judiciary.

Dan Kennedy

Assistant professor, School of Journalism, Northeastern University; author, 'The Wired City'

In fact, there is nothing to stop the U.S. government from censoring the media with regard to revelations such as those contained in the Snowden files -- nothing, that is, except longstanding tradition.

Michael Sargeant

Executive director, Democratic Legislative Campaign Committee

The GOP is at it again -- trying to give damaging policy ideas a pretty name in hopes that Americans will not notice that the ideas themselves are dangerous.

Brian Sims

Pennsylvania State Representative in Philadelphia's 182nd District

The budget Pennsylvania Governor Tom Corbett has signed into law -- that maintains 81 percent of the $1 billion in cuts he imposed in 2011 and 2012 -- demonstrates that supporting Pennsylvania's youth is simply not among his values or priorities.

Michelangelo Signorile

Editor-at-large, HuffPost Gay Voices

Glenn is right in describing it as "designed to send a message of intimidation." At this point, the governments involved are desperate to shut things down and don't seem to care how arrogant, over-reaching or unbelievable they come off.

Casey Bond

Personal finance writer; Editorial director, GoBankingRates.com

Reinstating the act wouldn't instantly fix everything that's wrong with our system, but it sure would be a much-needed start -- just don't count on it ever happening.

Wardah Khalid

Author, Young American Muslim

Since when did dissatisfaction with certain aspects of the government indicate one was disloyal to the U.S.? Many Americans oppose government policies, such as Obamacare, TSA regulations, immigration policy, and abortion, but that does not automatically equate them to a high threat.

Bob King

President, United Auto Workers

With joblessness still far too high, the income gap between rich and everyone else widening, racism and discrimination still festering and cities such as Detroit in the throes of bankruptcy, the words still call us to fight harder to achieve the unfinished agenda of civil rights and labor.

Tom Steyer

Business leader and investor

The centuries-old stream that is democracy can run around our capital, can run circles around our capital. California has advanced energy laws. So do other states. Isn't it time to coordinate those laws, to fulfill the will and needs of the people?

Laura W. Murphy and Grover Norquist

Attorney General Eric Holder's speech to the American Bar Association last Monday announcing critical reforms to the way the Department of Justice prosecutes and addresses drug crimes was historic and long overdue.