'This Is Not A Trade Agreement'

This is not a subtweet:

This Is Not A Trade Agreement, by Paul Krugman: OK, Greg Mankiw has me puzzled. Has he really read nothing about TPP? Is he completely unaware of the nature of the argument?

Personally, I’m a lukewarm opponent of the deal, but I don’t see it as the end of the Republic and can even see some reasons (mainly strategic) to support it. One thing that should be totally obvious, however, is that it’s off-point and insulting to offer an off-the-shelf lecture on how trade is good because of comparative advantage, and protectionists are dumb. For this is not a trade agreement. It’s about intellectual property and dispute settlement; the big beneficiaries are likely to be pharma companies and firms that want to sue governments.

Those are the issues that need to be argued. David Ricardo is irrelevant.