How can Germany respond to US sanctions against the Nord Stream - 2?

In response to US attempts to disrupt the construction of the Nord Stream 2 gas pipeline, Germany may impose certain trade duties on American goods, said political analyst Sergei Chernyakhovsky. He stated this on June 26 to a news agency correspondent, commenting on the news that Berlin was working on the issue of retaliatory measures in case of sanctions against Nord Stream 2. This topic has been discussed for a long time. There is a system of established ties between America and Germany. From here there is a certain economic interdependence of the two countries. Therefore, Germany's retaliatory steps may be in the nature of some kind of trade duties, as well as the reorientation of its export flows and changes in partnership relations, Cheryakhovsky said. In general, Germany may raise the question of withdrawing American bases from its territory. Again, how ready she is to decide on this, and where these troops can be withdrawn as a result. The Americans are ready to withdraw something to Poland, but are not ready to withdraw nuclear weapons there. In addition, the withdrawal of American troops to Poland creates not only a certain hint of a threat to Russia, but also a real threat to Germany. As the political scientist explained, aggressive Poland is turning into a threat to Germany, although we would seem to be used to something the opposite. Recall, as reported by the news agency, according to Bloomberg, the administration of German Chancellor Angela Merkel is working on retaliatory measures in case the United States imposes sanctions against Nord Stream 2.