https://www.washingtonpost.com/outlook/2019/07/30/elizabeth-warrens-trade-plan-is-bad-politics-worse-policy/

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«Warren’s criteria for negotiating with a trade partner — a range of labor, environmental, tax, energy, and other standards — are so stringent that Warren acknowledges the United States currently does not meet them. Thompson and Behsudi note that “the requirements would apply not only to new trade deals but to existing treaties that Warren pledges to renegotiate.” This means that Warren’s trade policy would actually be more protectionist in its effects than Trump’s, something that I did not think was possible.»