(CNN) Democratic presidential candidate Sen. Elizabeth Warren is set to release a sweeping universal child care plan on Tuesday that would guarantee child care from birth until the time children enter school.

The proposal marks the Massachusetts Democrat's second major policy outline to be unveiled this year as she competes for the 2020 Democratic nomination. Last month, Warren released a "wealth tax" plan aimed at the most affluent Americans whose net worth exceeds $50 million.

According to Warren's campaign, her child care proposal would create a federal program that establishes a network of public and family-run centers. The care would be free for families with incomes below 200% of the poverty level -- about $51,500 for a family of four. Those earning more would pay a subsidized fee based on their income, with no households shelling out more than 7% of their income.

Notably, Warren's child care plan would be paid by a part of the revenue from her proposed wealth tax. It is a clear indication that the tax proposal -- in addition to fueling the broad public support for raising taxes on the rich -- is already emerging as a major component of Warren's overall platform.

The universal child care policy is of personal significance to Warren because she believes that, more than once, her career almost went off track because of challenges with child care.

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