Control of US Senate could come down to tight Nevada race

Read MoreDemocratic U.S. Sen. Catherine Cortez Masto faces Republican challenger Adam Laxalt in a Nevada race the national GOP considers one of its best opportunities to turn a blue Senate seat redDemocratic U.S. Sen. Catherine Cortez Masto faces Republican challenger Adam Laxalt in a Nevada race the national GOP considers one of its best opportunities to turn a blue Senate seat red