By multiple accounts, Donald Trump is in one of the deepest funks of his presidency. The bad news is that the challenges and threats that are making his mood so dark are likely to get worse before they get better.

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Hundreds of rescue personnel dressed in white overalls sifted through smoldering rubble and mangled cars, searching for the remains of the victims of California's deadliest wildfire.

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A team of international researchers has verified the discovery of the first meteorite impact crater ever found deep beneath the Greenland ice sheet.

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2018 was toxic.

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