Since taking over from Biden, Harris has been warmly welcomed by voters, raising a record-breaking $81 million within 24 hours of her participation in the campaign and $200 million in the first week, while quickly winning the support of Democratic representatives and becoming the party's presidential candidate.

Harris' team raised $310 million in July, bringing the total she and Biden raised before dropping out to over $1 billion, the fastest to reach that fundraising threshold in history, according to the campaign.

By comparison, Trump's campaign said it raised $138.7 million in July and had $327 million cash on hand.

Such fundraising can be used for campaign advertising and voter mobilization efforts, and is therefore crucial for influencing voters who have not yet made up their minds which candidate they will support.

Harris' fundraising momentum continued into August, with her rallies in key swing states attracting a large number of small donations and good attendance.

It is worth noting that despite her strong fundraising performance, Harris has consistently said she is at a disadvantage in the competition with Trump in order to prevent supporters from becoming too complacent and maintain momentum.

The Democratic National Convention was held in Chicago, Illinois on the 19th and will last until the 22nd. Harris, who has already secured the Democratic presidential nomination, is expected to formally accept the nomination on the evening of the 22nd and deliver a speech entitled "For Our Future" to elaborate on her political propositions.

On Monday, on the first night of the Democratic National Convention, Biden not only promoted his own achievements, but also cheered on Harris, urging voters to support Harris and her running mate, Minnesota Governor Waltz, in the November election.