The U.S. Postal Service is increasing the pressure for dropping Saturday home delivery as it seeks to fend off massive financial losses.

Postmaster General John Potter is also expected to raise the possibility of higher rates Tuesday in a speech to postal-related businesses and officials.

The agency was $297 million in the red in period from October through December, usually its best season because of holiday mailings.

The Postal Service has previously proposed eliminating delivery six days a week, but got a cold reception in Congress. The renewed effort comes with a series of consultant reports supporting that idea, as well as other changes.