The presidential campaign of Sen. Bernie Sanders, I-Vt., announced Thursday that it raised $34.5 million in the final quarter of 2019 in Sanders' bid for the Democratic presidential nomination.

The total is the largest raised so far in a single quarter by a Democratic presidential candidate.

In a press release, Sanders' campaign emphasized the large number of donations – 1.8 million donations – as representative of the campaign's grassroots support.

According to a video the Sanders campaign posted Wednesday on Twitter, more than 1.2 million people donated to the campaign.

"Bernie Sanders is closing the year with the most donations of any candidate in history at this point in a presidential campaign," Sanders campaign manager Faiz Shakir said.

According to the Sanders campaign, "teacher" was the most common occupation of donors, and the most common employers of donors were Amazon, Starbucks, Walmart, the U.S. Postal Service and Target.

The average donation was $18.53, the campaign said.

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Former South Bend, Indiana, Mayor Pete Buttigieg's campaign announced Wednesday that it raised $24.7 million in the past quarter, bringing its yearly total to more than $76 million.

Other Democratic presidential candidates also released their fundraising totals as the new year began.

Entrepreneur Andrew Yang's campaign raised $16.5 million, a $6.5 million increase from the previous quarter.

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The presidential campaign of Rep. Tulsi Gabbard, D-Hawaii, said it raised $3.4 million, campaign spokesman Cullen Tiernan said.

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Former Vice President Joe Biden's campaign said later Thursday it raised $22.7 million in the last three months of 2019, which the campaign called its best fundraising quarter yet. The campaign said the average online contribution was $23 and the average overall contribution was $41,

Sen. Elizabeth Warren's campaign has yet to release its fundraising totals but told supporters in an email last week it raised $17 million so far in the quarter.

President Donald Trump's reelection campaign announced Thursday that it raised $46 million over the past quarter, with $102.7 million cash on hand as the president prepares to enter the general election.

Voting in the Iowa caucuses begins on Feb. 3.

Contributing: William Cummings, David Jackson