A half-dozen scattered elections did overnight what President Trump himself couldn't do in 10 months: revitalized the Democratic resistance, instantly and profoundly.

Why it matters: Democrats are more likely to fight harder in Congress, donate more generously, protest more loudly, resist Trump's policies more vigorously. They believe, for the first time since Trump won, they can stand up to the president and beat him.

The big red alert: This is an astonishing mood swing for a party seen as historically unpopular and ineffective heading into a small set of various elections scattered across the country. • The Democrats' internal divisions persist. And the absence of a strong leader in Congress or nationally will continue to bedevil them. But never underestimate the power of hope — and

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