Harris leads in the one Iowa poll that matters—with major national implications

Ann Selzer’s Iowa Poll for the Des Moines Register came out Saturday, and it’s a political thermonuclear bomb:

Kamala Harris: 47
Donald Trump: 44

The previous poll had Trump up 47-43 in September, and leading President Joe Biden 50-32 in June.

And this matters far beyond saying “it’s just one poll.”