With international negotiations stalled, many governments are choosing to unilaterally implement digital services taxes (DSTs). The United States -- which is home to the majority of tech giants that would be subject to such taxes, including Amazon, Apple and Google -- is using the threat of tariffs to both limit the global expansion of DSTs and push international negotiations toward the proposed reforms it backs. But with so many countries against Washington's preferred outcome, which critics say would allow U.S. tech companies to opt out of tax obligations in international markets, the risk of negotiations failing to reach an agreement this year is high, as is the risk of the United States implementing tariffs on its growing number of trade partners implementing DSTs. ...