Democrats' top target list are three senators — Mr. Tillis in North Carolina, Senator Martha McSally in Arizona, and Senator Cory Gardner in Colorado — who have been consistently losing to their Democratic challengers in polls. Those seats are the most likely to fall into Democratic hands. Democratic candidates are also running neck and neck with Republican incumbents in Georgia, Iowa, Maine, and Montana. New polls show the veteran Republican senator Lindsey Graham in a tight race in conservative South Carolina against Jaime Harrison, a Democrat. Read More!