Free trade isn't neoliberalism, per se.
From Google AI
"Neoliberalism is a political and economic philosophy advocating for free markets, minimal government intervention, and deregulation. It emphasizes individual liberty, competition, and the efficiency of markets in allocating resources. Neoliberal policies often involve privatization, deregulation, and austerity measures, with the goal of promoting economic growth and individual prosperity."
This hardly describes Krugman's economic world view, not even close. Maybe read him sometime before you comment on what he believes?