Obama warns nationalism will bring greater global clashes

• "That's largest trend that I'm seeing that I'm concerned about, because it's not isolated to one particular country — it's a global phenomenon."
• Obama — speaking earlier this month in Seville, Spain, in remarks posted this weekend by the BBC — said it's a mistake to "reassert these very hard-fixed borders at a time when technology and information are borderless," and travel and supply chains are global."
• He also said he is "worried about the destabilization of our environment," adding "climate change is not something off in the future."

Go deeper:

• The world's growing white supremacy problem
• We've reached a tipping point on climate change