It’s now Biden, Warren, Sanders — and everyone else

The bottom is falling out of the Democratic presidential primary. And the top-tier — no longer five candidates, but three — is becoming more insurmountable.

For more than a year, Democrats had approached their nominating contest with a widely-shared belief that — like Republicans in the earliest stages of their primary four years ago — they, too, might take turns rising and falling in an expansive field. That expectation sustained the campaigns of more than two dozen contenders this year.

But in recent weeks, the leading band of candidates has contracted unexpectedly early. Heading into the fall, only three contenders are polling above single digits: Joe Biden, Elizabeth Warren and Bernie Sanders.

Kamala Harris and Pete Buttigieg remain at the periphery, while lower-polling candidates have largely failed to muster sustained, upward movement in fundraising or polling.According to interviews with about two dozen Democratic operatives and consultants, there is little reason to expect any of them will.

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