Senator Tom Carper said he wants to embarrass the House of Representatives to get them to approve the postal reform bill before the August recess.
House leaders initially planned a vote after the July 4th recess.
But Republican party leaders say they don’t expect it to happen until September.
The Wilmington News Journal reports that postal officials and mailing industry leaders wanted the House to pass the measure before the current fiscal year ends on September 30th.
The Delaware Democrat told the paper that he hopes that at some point they can find the time to do – what he called – something important.
Carper co-authored legislation that was approved in the Senate and would return $11 billion the postal service overpaid to a pension fund.
The measure would also secure the postal service’s long-term financial viability as well as keeping Saturday service alive.