FILE - In this June 27, 2016, file photo, Democratic presidential candidate Hillary Clinton, accompanied by Sen. Elizabeth Warren, D-Mass., arrives to speak at the Cincinnati Museum Center at Union Terminal in Cincinnati. Warren is being considered as a vice presidential pick for Clinton.
FILE - In this June 27, 2016, file photo, Democratic presidential candidate Hillary Clinton, accompanied by Sen. Elizabeth Warren, D-Mass., arrives to speak at the Cincinnati Museum Center at Union Terminal in Cincinnati. Warren is being considered as a vice presidential pick for Clinton. Andrew Harnik AP
FILE - In this June 27, 2016, file photo, Democratic presidential candidate Hillary Clinton, accompanied by Sen. Elizabeth Warren, D-Mass., arrives to speak at the Cincinnati Museum Center at Union Terminal in Cincinnati. Warren is being considered as a vice presidential pick for Clinton. Andrew Harnik AP

Warren is best known – and most controversial – Democratic VP option

July 16, 2016 7:00 AM