What a spectacle. Much of America is quarantined at home, the public is so panicked there’s a run on toilet paper, the country desperately wants reassurance, and Nancy Pelosi and Chuck Schumer decide to take a bipartisan rescue bill as a political hostage.

That’s the display of Democratic leadership in a crisis the nation received on Monday as Senate Democrats blocked a $1.8 trillion bill that has urgent money for workers, hospitals, small business and, yes, even larger companies threatened by the forcible shutdown of the...