Vox published an explainer on Warren's trade policy when she released her plans:
President Trump’s pitch to white working-class voters has involved plenty of culture war politics, but also a striking break with the free trade policies adhered to by most Republicans over the past generation. [...]
Warren’s plan is a rejection of that legacy, but also a counterpoint to Trump, who sees trade negotiations primarily through the lens of helping American exporters. For Warren, the key issue isn’t American interests versus those of foreigners, but wages and environmental protections versus the shared interests of multinational companies in sloughing off regulation.