https://www.nytimes.com/2019/02/25/us/politics/bernie-sanders-10-million.html

By Shane Goldmacher
Feb. 25, 2019

A clutch of advisers to Senator Bernie Sanders began arriving at the Capitol Hill townhouse that served as his makeshift headquarters before dawn last Tuesday, where they readied themselves to track, among other things, the deluge of donations that would land after Mr. Sanders made his presidential campaign official.

As the team snacked on doughnuts that Jeff Weaver, Mr. Sanders’s 2016 campaign manager, had brought for launch day, one laptop screen showed a map of the United States. It would light up with an orange dot every time someone gave with the location of each donation.

Within minutes of the 7 a.m. announcement, the whole screen was glowing orange, according to people in the room.

By Monday, after less than a week as a presidential candidate, Mr. Sanders has collected $10 million from 359,914 donors, campaign officials said. But perhaps just as daunting a figure for his rivals is this: Nearly 39 percent of those donors used an email address that had never before been used to give to Mr. Sanders.