With only weeks remaining in the 2024 presidential contest, Vice President Kamala Harris’s team is launching the single largest get-out-the-vote effort in modern history.

Democratic insiders are betting that Harris’s record cash haul, surge in volunteer support and constellation of Democratic organizing superstars will be enough to overcome state polling that has tightened significantly in recent weeks. Even so, the Harris campaign now finds itself committing new resources to states once solidly in the vice president’s column — including Michigan, Wisconsin and Nevada.

Are these recent polling shifts indicative of a changing race, or are they to be expected in the closing weeks of a hotly contested, super-partisan presidential campaign? I spoke with some of Democrats’ top organizers to better understand the challenges and opportunities behind Kamala Harris’s expansive ground game.

There’s no doubt Harris has the money and the numbers to field a historic voter engagement operation. Last week, a source close to the campaign estimated Harris surpassed $1 billion in fundraising, an astronomical sum given the short time she’s been a candidate. Harris has been pouring that cash into........

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