Warren, a Massachusetts senator who recently established an exploratory committee for the 2020 Democratic nomination, said she would use the revenue to rebuild the middle class, potentially by using the money to pay for child care or relieve student debt. The proposal underscores Warren’s economic populist message at the heart of her campaign to challenge President Donald Trump in 2020. A former Harvard law professor, she has written extensively about the shrinking middle class and made enemies on Wall Street for pinning the blame for rising income inequality on the wealthy and large corporations.
