U.S. Postmaster General Patrick Donahoe won a key supporter in his campaign to end Saturday letter delivery after President Obama endorsed the idea in his 2015 budget. But did the president go a bit too far? The White House budget would give the U.S. Postal Service authority to eliminate both Saturday letter and package delivery immediately. Donahue has called only to end the letter service. First Class mail may be dying, but the agency’s package revenue is growing, and the USPS is counting on this line of business to keep it afloat.