Over at vox, Kimberly Elliott says the U.S. should lower tariffs on imports from poor countries:
... the Doha Round, under the best of circumstances, will take some time to conclude, and the US and other rich countries should move as quickly as possible to further open their markets to the world’s poorest countries. The eighth of the Millennium Development Goals adopted at a UN summit in 2000 calls on the rich countries to provide duty-free-quota-free market access for the least-developed countries (LDCs). This goal was reiterated at the WTO’s 2005 Hong Kong ministerial meeting, but US negotiators would only commit to provide access for 97% of products and only in conjunction with the conclusion of the Doha Round
...
... President Obama would lose nothing and could gain a great deal of good will, as well as providing an economic boost to struggling developing countries, by asking Congress to act now and provide access on 100% of products, as the European Union already does, rather than just 97% as promised in Hong Kong. Three percent may not sound like much, but such liberalisation would unblock a number of items that that are of the most interest to poor countries.
Providing full market access will not reverse the decline in trade flows, but it would open opportunities for some of the poorest countries in the world. It would also address a fundamental unfairness created by the fact that US trade policy, like that of other rich countries, discriminates against poor countries and poor people. The highest US tariffs fall on agricultural products and labour-intensive light manufactures, where many developing countries have a comparative advantage.
I've always thought this argument was pretty compelling, especially when you take into account Figure 2 of her piece, which shows how Bangladesh and Cambodia pay significantly higher U.S. tariffs than do the UK and France.