Champlain Valley southward into the Valley of Vermont. The Vermont Lowlands are primarily underlain by sedimentary rocks, especially limestone and shale, though metamorphic rocks such as marble and slate are also present. Lake Champlain is situated in the Champlain Valley between the Green Mountains of Vermont and the Adirondack Mountains of New York, drained northward by the Richelieu River into the St. Lawrence River at Sorel-Tracy, Quebec (northeast of Montreal). Major tributaries of Lake Champlain include Otter Creek and the Winooski, Missisquoi, and Lamoille rivers in Vermont, and the Ausable, Chazy, Boquet, and Saranac rivers in New York. Lake Champlain also receives
St. Lawrence County, New York home to St. Lawrence University, State University of New York at Potsdam, Clarkson University, the SUNY-ESF Ranger School, and the State University of New York at Canton. Prior to the 1992 Presidential Election, St. Lawrence County was a traditionally Republican county, supporting the Democrats only in their sweep of New York State counties in 1964. From 1992 through the 2012 election, St. Lawrence County swung Democratic, posting double-digit victories for Democratic candidates, most notably in 1996 when Bill Clinton won the county by 28-point margin over Bob Dole. The first Republican victory in the county came in 2016 when Donald