Hillary Rodham Clinton's State Department emails must be made public on a rolling basis instead of waiting for a mass release in January, a federal judge ruled, rejecting a government proposal for releasing about 55,000 pages of the correspondence early next year.

U.S. District Judge Rudolph Contreras also ordered the State Department to update the status of document production every 60 days and to propose a deadline for making public any of Clinton's emails related to the deadly 2012 attack on a U.S. mission in Benghazi, Libya.

Clinton, who announced her bid for the 2016 Democratic presidential nomination last month, is facing scrutiny for exclusively using a private email account while secretary of state. Campaigning in Iowa Tuesday, she said she wants the emails released as soon as possible but put the onus on the State Department.