Carlos Curbelo’s South Florida congressional race tests how well a strong incumbent can survive a national tide.

Carlos Curbelo was fuming. It was a sticky Friday afternoon in early July, and the Republican congressman had spent the past hour traipsing through a University of Florida research center in Homestead, languidly asking academics about their work on environmental challenges confronting this more rural area south of Miami.

But as Curbelo emerged, blinking in the sunlight, I told him that his latest fight with the Trump administration had just metastasized.

Curbelo, seeking a third term, represents the most Democratic-leaning district held by a Republican running for re-election this cycle. His willingness to sharply criticize the Trump administration — evidence, allies say, of his independent profile — helps explain why he has thrived here so far.

Facebook’s stock rose along with Donald Trump; its fall came when it took the blame for him.

As Donald Trump rose to power in American politics, Facebook rose along with him. The day he announced his run for president, Facebook’s stock closed at $80.71. The day he was elected president, it closed at $124.22. And last week it hit its all-time high of $217.50 — just before it recorded the largest single-day market capitalization loss in history, cleaving $119 billion off its total value by the ding of the closing bell. And because of Trump.

Facebook’s drastic fall from grace is a direct result of an influential faction of the American populace seemingly incapable of accepting the election of President Trump as legitimate, and resolved to reconcile this perceived paradox by casting blame on someone or something. Anything but an honest reflection of popular political wills sufficient to win the Electoral College.

Meanwhile, the juggernaut Apple just hit the $1 trillion market capitalization mark. The juxtaposition speaks to the effects of political risk for technology companies and the varied exposures and approaches to an increasing volatility in public discourse.

Despite extreme poverty, this country offers lessons on how to cut childhood mortality.

When then U.N. Secretary-General Kofi Annan visited Niger in July 2005, it was a desperate bid to draw the world’s attention to a deepening crisis. Droughts and locusts had sparked a food shortage threatening 2.4 million Nigeriens, including 800,000 children. Now, 13 years later, Niger is commanding the attention of public health experts again — this time as a beacon of success in saving children against all odds.