Obama would use the savings to help pay for an expansion of Pell grants, which go to the neediest students and as their name implies require no repayment at all.
House Republicans would also use 10-year Treasuries as the baseline, but add 2.5 percentage points for both subsidized and unsubsidized loans. And while rates under Obama's plan would be fixed, House Republicans would let them fluctuate over the course of the loan, up to a cap of 8.5 percent. Republicans say their goal is to make the program budget neutral. The cost of the current policy was almost $6 billion last year, according to the CBO.
Senate Democrats have taken a different tack. They want to freeze the current 3.4 percent rate for two years, at a total cost of $8.3 billion. Longer term, they propose a cap of 6.8 percent, increasing the odds that Congress will subsidize the cost of borrowing for years to come.
Although Obama supported a failed Senate plan last week to freeze rates, the president's earlier plan remains the preferable approach. Republicans are right to keep pushing for market-based rates, though they should join Obama in steering savings from the change in the program to additional Pell grant funding.
Extending the current below-market rate may make college cheaper for the roughly 7 million students who get subsidized Stafford loans, but it's not the best use of scarce government funds. That money should be moved to Pell grants or similar programs with a better chance of getting kids to college who couldn't otherwise afford it.
The challenge now is for the House and White House to resolve their relatively minor differences and bring Senate Democrats on board by July 1. Better access to higher education is a vital component not just of economic prosperity but of a healthy democracy.