Hillary lost because she ignored the midwest because neoliberal ideology made it a no-go zone. The point being made by the article and tweets
@FAH1223 posted is that ideology influences strategy. Hillary and the neoliberals are anti-tariffs because they are roadbumps on the Globalization highway and inhibit the free flow of goods and money out of the pockets of domestic workers into the pockets of multinational corporations.
Neoliberalism is a turnout-depressing ideology in the places where it matters. Economic populism is a turnout-juicing ideology. If Kamala fills her team with neoliberals, she will not be able to credibly make the arguments that resonate most with the most electorally-valuable voters. She should loudly advocate that she plans to keep the populist Biden tariffs and economic agenda in place to neutralize Trump's economic populist appeal.