“Republicans appeared to have a firm grip on the Senate heading into the final two years of President Donald Trump’s term. But with less than two months until Election Day, control of the chamber is now up for grabs,” the Associated Press reports.“Democrats have found themselves competing in states that once seemed beyond their reach as President Donald Trump’s slipping approval ratings and voters’ dissatisfaction with the economy create a difficult political environment for Republicans. But races Democrats once counted on winning have also become more complicated.”Keep track of the latest on the Polling Dashboard.