Senator Elizabeth Warren, a Democrat from Massachusetts, left, and Hillary Clinton, 2016 Democratic presidential nominee, sit on stage during a campaign event in Manchester, New Hampshire, U.S., on Monday, Oct. 24, 2016. Clinton made the case for herself in the presidential race against Donald Trump during rallies in Pennsylvania, and in a sign of her campaign's increasing outreach, also made a pitch for the efforts by Democrats to gain control of the Senate.