Washington (CNN) Andrew Yang raised $10 million in the third quarter of 2019, his campaign tells CNN, a substantial haul that dwarfs the $2.8 million the businessman-turned-politician raised in the second quarter of this year.

Yang's fundraising, powered by a devout grassroots donor base known as the Yang Gang , has turned the once longshot candidate into a fixture on the debate stage who is now polling better than most of his Democratic competitors.

Yang's haul is substantially lower than the $25 million that Vermont Sen. Bernie Sanders raised or the $19 million South Bend, Indiana, Mayor Pete Buttigieg announced on Tuesday. But it does land Yang close to the $11.6 million that California Sen. Kamala Harris raised in the third quarter and markedly higher than candidates like New Jersey Sen. Cory Booker, who announced on Tuesday he had raised $6 million in the third quarter.

The third quarter of an off year is often one of the most difficult to raise money, so Yang more than tripling his second quarter haul demonstrates an ability to turn fervent online support into dollars.

Yang enters the final three months of 2019 with $6.3 million in the bank, his campaign said. His average campaign contribution is $30.18 and he has received donations from nearly 300,000 unique donors. Ninety-nine percent of Yang's donations were under $200, they added.

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