Evan Halper

Warren on Friday laid out a detailed plan that relies on trillions of dollars in new taxes on the rich and corporations, big pay-ins from employers and aggressive cost cutting.

Hillary Clinton's email problems continued to haunt her presidential campaign Tuesday after a federal judge ruled that aides to the former secretary of state should be questioned in a lawsuit that alleges the private server set up in her home may have been intended to dodge federal transparency laws.

Days removed from a humbling defeat in New Hampshire that stirred fresh concern about her candidacy, Hillary Clinton questioned the feasibility of the platform that has fueled Bernie Sanders' unlikely insurgency, challenging her rival during a nationally-televised debate to "level with the American people" about the true cost of his plans.

The Democratic presidential candidates strongly disagreed over the U.S. role in the Middle East as they debated in New Hampshire on Saturday, with Sen. Bernie Sanders urgently needing a big break to overtake Hillary Clinton.