Sen. Kamala Harris suspended her presidential campaign Tuesday, after falling from the top tier of Democratic candidates and failing to resurrect a doomed fundraising operation.

"I've taken stock and looked at this from every angle, and over the last few days have come to one of the hardest decisions of my life," Harris, D-Calif., said in a statement shortly after her departure was first reported.

"My campaign for president simply doesn't have the financial resources we need to continue."

Earlier Tuesday, CNBC reported that Harris canceled a fundraising event in New York amid a flood of recent reports describing her campaign as chaotic.

Some of her top bundlers expected her fourth quarter totals to be a "disaster" and noticed that the "events were not going well," according to a member of her finance committee, who spoke to CNBC on Tuesday on the condition of anonymity.

CNBC reported in October that donors were struggling to persuade their networks to write checks to her campaign. In some cases, many of her supporters have told the campaign that they will not host events for her.

Harris informed her staff Tuesday that she is suspending her campaign, an aide told CNBC prior to her official announcement.