Some lawmakers think prioritizing interest payments would placate bond investors if the government breaches its borrowing limit, the Journal said.
However, heads of the nation's largest financial institutions told the officials in meetings that prioritizing some payments would create insurmountable uncertainty for investors, drive up borrowing costs and disrupt markets, the Journal said, citing people familiar with the meetings.
As the U.S. government moved into the second week of a shutdown on Monday with no end in sight, a deadlocked Congress also faced an October 17 deadline to increase the nation's borrowing power or risk defaulting on its debt.
If no deal is reached, many outside observers including debt-ratings firms assume the government will begin prioritizing payments to bondholders over others, rather than risk defaulting on its debt, the Journal said.
(Reporting by Sakthi Prasad in Bangalore; Editing by Supriya Kurane)