Dems turning more GOP Senate strongholds into midterm battlegrounds

Ten weeks from Election Day, the Senate battlefield is expanding into traditionally Republican states like Alaska, Kansas, Iowa, Mississippi, Nebraska, and Texas. Democrats are within striking distance in Iowa, Alaska, and Texas, with longer shots in Mississippi and Kansas. Cook Political Report now rates the Texas and Iowa Senate races as "toss-ups," previously "lean Republican." Democrats' clearest path to 51 seats involves holding Michigan and picking up North Carolina and Ohio.