Sen. Bernie Sanders (I-Vt.) has purchased a nearly $600,000 summer retreat on Vermont’s Champlain Islands, the Vermont newspaper Seven Days reported Monday. “We’ve traveled up to the islands many times over the years — almost always on day trips,” Jane Sanders, the former White House contender's wife, said in a statement. "The entire family is very excited about it.” “We’ve always been impressed with the North Hero community, eaten at the North Hero House and Shore Acres and have suggested them to friends who were looking for a beautiful place to stay or have dinner. St. Anne’s Shrine in Isle...