"If we don't adapt to the reality of a changing climate there could be serious repercussions ... I think the climate is changing. It is inconceivable to me that 5 billion people living on this planet don't have an impact on that."
There was one time when Rubio tried very hard to accomplishment something, even asserting a leadership role: immigration reform. Not only did he fail to accomplish enactment of the bill, his leadership was a colossal disaster.
Perhaps we can now spend less time on Donald Trump's demagogic proposals for building a wall and banning all Muslims from entering the country, and spend more time on what the rest of the field is proposing.
It will be incumbent upon Clinton and Sanders to emphasize civil disagreement, but even that may not be enough to prevent lost voters in November. Which only matters if the general election is really close. Which it might.
A vote for Trump is to confirm the liberal stereotype of conservatives as racists. To have the last laugh, you can't prove us liberals correct. You need to prove us wrong.
With Republicans likely to at least control the House after the 2016 election, which Democratic presidential candidate has the right approach to deal with the inevitable resistance?
Rush Limbaugh admitted that "it's now out in the open that the Republican conservative base is not monolithically conservative ... That's not the glue that unites them all."
You can understand why Republicans won't talk more about global warming. But there isn't an influx of illegal immigration going on. Why does the obsession on the right persist?
GOP operative Ed Rogers says "this is shaping up to be a change election, and nothing about a Clinton candidacy offers change." But are voters that dissatisfied with the Obama presidency? The numbers don't back it up.
The EPA's Clean Power Plan is America's main tool for complying with the Paris agreement. States have until Sept. 6 to submit a plan that qualifies for extra federal support. Your mission: get your state to comply and submit a strong plan.
George W. Bush suffered Hurricane Katrina and the Iraqi quagmire, Bill Clinton was impeached, Ronald Reagan was staggered by the Iran-contra scandal, and Richard Nixon was run out of town. What did Obama do right?
The Paris climate agreement is a landmark achievement. But what is our next step? Robert Pollin has laid out a road map in his new book, "Greening The Global Economy."
When it comes to climate, the debate is not academic. There is a significant difference in approach, substantively and strategically. The choice is yours, and it will impact the world.
While Obama has championed the "green jobs" cause since his first day in the Oval Office, his primary audience this time wasn't recalcitrant Republicans. It was fossil fuel hungry nation of India.
Are we prepared to build on this initial agreement, and push our country and others to demand more greenhouse gas cuts until the crisis is behind us? Get ready to celebrate, and get ready to fight for deeper cuts the next day.
Six years ago, Democrats broke ranks with Obama on capping carbon. Today, Democrats are holding firm. Republicans have proven unable to win in the court of public opinion.
Jindal could have been the face of a modern Republican Party: racially diverse, factually based, mathematically literate, governmentally competent. Instead, he epitomizes a "stupid party" he claimed to reject.
Sen. Ted Cruz steadfastly opposed a path to citizenship, and voted against the bill that Sen. Marco Rubio supported. Yet somehow their positions are basically the same?
In Tuesday's Republican presidential debate, both Senator Rand Paul and former Governor Jeb Bush tried to offer a new Republican approach to climate, and both got tied up in knots.
Democrats have won the presidential popular vote for five of the last six elections. So don't let anyone tell you than the midterms and off-year election results mean that the nation is fundamentally conservative and Republican.
Now is the time to use the momentum from the Keystone pipeline decision, and mobilize for a broad cap on carbon emissions and a massive investment in clean energy jobs.
The leader of a fossil fuel divestment movement explains how he is carrying out the vision of his grandfather, Vice-President Henry Wallace, who once called for the "Century of the Common Man."
Sen. Marco Rubio is not the first presidential candidate to miss Senate votes. What he really missed was the chance to prove he could be a leader. His one try on immigration was a colossal disaster and he never tried again.
Sen. Marco Rubio has been christened the winner of the last debate by the pundits after staring down Jeb Bush's attack on his senatorial attendance record. But what did he actually say about his ideas and policies?
A candidate at tonight's debate who wants to shake up the race would turn to Ted Cruz and say: "That's great that you wanted to defund Planned Parenthood. Yet you concocted a ridiculous legislative strategy with no plan to win."
Instead of spending the time to identify new ideas, craft polices and corral support for those policies among party members, Republicans spent the last few years going down the Benghazi and IRS rabbit holes.
One can hope that Justin Trudeau's victory in Canada will help advance our collective wisdom, and make it easier for politicians in the future to campaign on Economics 101.
If no leading Republican can stand up to the most extreme right-wing faction of the party now, don't be surprised if voters conclude that a Republican president would let the House Freedom Caucus run wild.
Canada's Liberal Party, after losing the prime ministership and being relegated to third party status, is on the cusp of regaining control of the government Monday. If so, it has John Maynard Keynes to thank.
Boehner and McCarthy ducking a fight with the Freedom Caucus on the basis of party unity is like refusing to get chemotherapy because you want your body to be united with your cancerous tumor.
On trade, every Democratic presidential nominee has for the past three decades campaigned one way and governed another. Why does this keep happening? The answer is not money.
The Republican candidates for president are all trying to cut taxes for the wealthy even more than George W. Bush did. Here's the scorecard of those candidates with specific proposals.
Proposing a handgun ban certainly wouldn't make it become law anytime soon, but it would refocus the debate on the actual source of most of our senseless gun deaths.
Speaker John Boehner has to reckon with the fact that winning the midterms did nothing to make his party more responsible and did nothing to advance his own policy goals.
Jeb is planting his flag on constantly moving ground. GDP has steadily grown throughout the Obama presidency after the stimulus sparked the recovery. If the recent strong quarters hold up, Bush's pledge will be exposed as decidedly empty.
But Boehner set his resignation date for October 30th, not September 30th. He's giving himself an extra month. That means he can try to pass still more things with the help of Democrats.
Some anti-abortion conservatives are one week from shutting down the government over Planned Parenthood funding. Yet they got no encouragement from the leader of the world's biggest anti-abortion institution.
The days of Republicans getting away with painting Democrats and liberals as incompatible with faith are behind us. And the risk of political embarrassment this week remains squarely with the GOP.
Now it is clear how narrow Scott Walker's base of support was, and how limited is the strategy of union-bashing. Republicans might want to consider appealing to union workers rather than bashing them.
Pope Francis arrives in America on Tuesday, meets with President Obama on Wednesday, addresses Congress on Thursday and the United Nations on Friday. But no one knows exactly what he wants to accomplish.