President Obama will make the case for Hillary Clinton Wednesday night with about as many Americans approving of him as disapprove of him.

That puts him somewhere in the middle of other outgoing presidents who have given convention speeches supporting their potential successors. Bill Clinton, Ronald Reagan and Dwight Eisenhower were all relatively well liked when they left office. George W. Bush and Harry Truman, meanwhile, delivered their addresses even while their approval numbers were in the tank.

Madeleine Albright, who spoke Tuesday night at the Democratic National Convention, says it's "almost too hard to express" the excitement she feels over Hillary Clinton's presidential nomination.

As a teenager, James Alan McPherson worked as a passenger-car waiter on the Great Northern Railroad. The experience shaped him as a man and as a writer; he would spend his life producing short fiction and essays exploring race and class in America — the gulf separating white privilege from the black experience. One of his first published stories, "On Trains," included in his fiction collection Hue and Cry, chronicles a white woman's unthinking treatment of black waiters and porters on a train, and subtly reveals its lingering effects on all involved.

For decades, Japanese fishermen have told stories about the existence of a dark, rare beaked whale that they called karasu — the "raven."

But now, scientists say they have genetic proof to back up these tales. Long mistaken for its relative, the Baird's beaked whale, scientists say it represents an entirely new species.

Democrats called on Americans to reject what they called the politics of fear and division of the GOP and elect Hillary Clinton during the third day of the Democratic National Convention in Philadelphia.

Everyone from President Obama to democratic vice presidential candidate Tim Kaine contrasted the Democratic vision of America to the vision offered by Republican presidential nominee Donald Trump.

"America is already great," President Obama said. "America is already strong. And I promise you, our strength, our greatness, does not depend on Donald Trump."

As he takes the stage Wednesday night at the Democratic National Convention in Philadelphia, vice presidential nominee Tim Kaine is firmly in Hillary Clinton's camp — and his party's — on the big health care issues. Now a U.S. senator from Virginia, Kaine supports the Affordable Care Act and pushed its Medicaid expansion. He also worked to overhaul the mental health system when he was governor of Virginia.

Here are highlights and a few flashpoints of controversy from Kaine's health policy record:

Mental health

First lady Michelle Obama on Monday referenced a bit of history in her speech at the Democratic National Convention that has both surprised and moved many.

"That is the story of this country, the story that has brought me to this stage tonight, the story of generations of people who felt the lash of bondage, the shame of servitude, the sting of segregation, but who kept on striving and hoping and doing what needed to be done so that today I wake up every morning in a house that was built by slaves," she said.

The federal government released its first overall hospital quality rating on Wednesday, slapping average or below average scores on many of the nation's best-known hospitals while awarding top scores to many unheralded ones.

The Turkish government has cracked down on independent media since an attempted coup on July 15, shutting down at least 45 newspapers and 16 TV stations, The Associated Press reports.

On Wednesday, the state-run news service Anadolu Agency reported 47 arrest warrants had been issued for employees of the newspaper Zaman, and 13 people had been detained.

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KELLY MCEVERS, HOST:

And now to Philadelphia where our co-host Audie Cornish is at the Democratic National Convention.

AUDIE CORNISH, HOST:

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