Via Gregory D. Johnsen in agsiw.org: In recent months, as the United States has struggled to deter and degrade the Houthis, Yemen’s United Nations-recognized government has worked to dramatically increase economic pressure on the group. The economy, in particular revenue and liquidity, is the Houthis’ Achilles heel. This is where the group is most vulnerable, and this is exactly where the government in Aden is pressing. This approach, however, also carries significant risks. In the short term, increasing economic pressure on the Houthis is likely to prompt them to reignite attacks on Saudi Arabia, while in the long term it could make reuniting Yemen into a single state all but impossible.