> Sure, but aren't we past rational debate on this point?
No.
> Not only are the new trade policies irrational, it's quite possible that they're intentionally irrational as a bargaining or maneuvering tactic.
Not really, at least not a well-considered bargaining or maneuvering tactic. There is no incentive to comply if there isn't a clear compliance goal and a clear willingness to reward progress toward it as well as punish noncompliance. Irrationality is poor bargaining.
More to the point, though, the space for rational debate is NOT with the architects of the policy, who, yes, seem beyond reason. The space for debate is among everyone else, including the people who have the Constitutional power to arrest the executive policy in this area (whether that debate centers on the merits of policy in the broad sense or their own narrow future political fortunes or some combination of those.)
> As I commented yesterday, there's a playbook for reshoring that's being totally ignored
Broad reshoring of industries or broad sectors that have left the US because its comparative advantage in the present world trade regime has shifted elsewhere is an objectively economically harmful idea, and expending resources on it consumes resources that could be productively employed in pursuit of relative economic inefficiency. There may be select industries that can be identified where there is a rational argument that that would be only a short-term hit and that there would be long-term benefits, or where security or stability issues given real expected international threats make that a cost worth bearing (though in the latter case it is still generally probably better to work to maintain existing alliances and work jointly to "reshore" critical industries broadly within our international political alignment rather than making it an isolated national policy, both because there are often going to be other places in the alliance where it is less out of line with present comparative advantage and because it is a broadly shared benefit where it makes sense to share the costs.)
We don't need a better playbook to achieve autarky, we need to reject it as a goal.