An excellent summary from Peter Hall:
Given this backdrop, the words ‘Buy American’ in US fiscal stimulus legislation sent shockwaves around the world, kindling fears of a global relapse into protectionism. France joined the fray, advocating a ‘France-first’ industrial policy that would require multinationals to begin their layoffs offshore. More recently, Mexico announced retaliatory trade measures against certain US goods. In addition, the nationalisation or near-nationalisation of Western banks has led to allegations of covert protectionism, in which domestic deals would receive favourable treatment.
The rhetoric alone is troubling. Protectionism is an instinctive defence mechanism that sells well. It might even yield temporary benefits, but in the end, hurts its perpetrators and everyone else, too. Even more discouraging, one action leads to a sequence of retaliatory actions that snowball, magnifying the damage and, especially in today’s integrated economy, ensures that the effects are felt almost universally.
Will the wish for a quick win carry the day? We can all hope that reason will prevail, and that rhetoric will remain just that. Multinational corporations understand that their competitive position depends critically on maintenance and enhancement of the current system. And it’s quite likely that the average worker gets it too, perhaps more than ever before.
... The case for continued globalisation remains strong. Reverting to protectionism would increase costs worldwide, lower overall welfare, and prolong the recovery. No one wants that. With economic conditions as bad as they are, the last thing needed is additional bad news.