Francis Wilkinson, Columnist

He Shows He Is Unfit. Yet He's Still the President.

The system can deal with a crooked president. But not a crazy one.

Not reassuring.

Photographer: Mandel Ngan/AFP/Getty Images
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President Donald Trump is not always crazy like a fox. And that -- more than obstruction of justice, or any potential criminality related to Russia -- is the greatest threat facing the U.S. It's also a threat that U.S. institutions are failing to acknowledge, let alone confront.

Trump is unlikely to succeed at completely derailing the FBI investigation into his campaign's ties to Russia. But he might undermine it enough to avoid any serious consequences. Even without his subterfuge, the investigation could prove inconclusive.