The U.S. has formally labeled China as a "currency manipulator"; Jeffrey Sachs comments.

Michael Nutter discusses the race for the Democratic nomination — talking about his own support for Joe Biden, analyzing the campaigns of the mayors in the race, and more.

The imposition of new U.S. sanctions on Venezuela will have little impact, says Richard Nephew , because they only forbid business activities with the country's government, and it's doubtful there is any such activity left to be cut off.

China allowed its currency to depreciate because it makes Chinese exports cheaper in foreign markets, potentially offsetting U.S. tariffs. “That short-term game comes at a longer-term cost, but Beijing appears ready to pay it,” says Patrick Chovanec.

Far from achieving new trade agreements with China and the EU, President Trump has undermined business confidence and cross-border investments, writes Jeffrey Sachs; it's time to end these trade blunders.

"Let's not prepare for confrontation" with China, says Jeffrey Sachs. "Let's insist on cooperation. That's the way to prosperity and survival."

"A practical approach to climate change will need to rise from the ashes of decades of hyper-partisan discord over climate," writes Steven Cohen.

“You can’t make these kinds of threats if you can’t operationalize it...That shows there are limitations to U.S. power," comments Richard Nephew on U.S. sanctions on Iran & Trump's goal of bringing Iranian oil exports to zero.

On the TODAY show, Columbia Energy Founding Director Jason Bordoff weighs in on the Google climate conference controversy. He argues we should be less concerned that the attendees traveled by private jet & more concerned about decarbonizing air travel.

Takatoshi Ito comments on how Japan needs to reform its pension system in order to accommodate for a growing aging population.