Illustration of Capitol building with donkey and elephant
Pre-midterm polls have shown Democrats leading in many of their target states. Illustration: Rita Liu/Guardian Design/Getty Images
Pre-midterm polls have shown Democrats leading in many of their target states. Illustration: Rita Liu/Guardian Design/Getty Images
Key US Senate races called as Democrats aim to retake chamber from Republicans

Roy Cooper wins election in North Carolina as Democrats hope disapproval with Trump gives them advantage