An international conference opening in a secluded resort in Switzerland on Saturday is set to discuss the first building blocks of a peace process in the Ukraine war. National leaders and other high-ranking representatives from 92 countries as well as from international organizations are expected to attend. Russia, however, was not invited. They are to discuss issues ranging from grain exports from Ukraine, the safety of the Russian-occupied Zaporizhzhya nuclear power plant and humanitarian issues including prisoner exchanges. The United States, Kiev’s most important ally, will be represented …