Joe Biden is the former vice president of the United States.
He is the 2020 Democratic front-runner from the day he entered the race officially in the spring.
CNN reports he could face a major campaign cash crunch.
He ended September with less than $9 million in the bank.
Biden spent more money than he raised in the previous three months.
Biden's total cash on hand is less than half of his main rivals for the Democratic nomination.
CNN said Biden's fundraising situation is bad. And there are few signs it's getting better.