Voters across the United States are casting ballots in the first nationwide election in the era of Donald Trump’s presidency. Republicans hope to maintain their narrow Senate majority, but fear the House is slipping away. However, should Democrats win control of the House or the Senate, they would claim subpoena power to investigate Trump’s personal and professional shortcomings. Acknowledging the stakes in the closing days of campaigning, Trump stressed to voters last night that everything is on the line.