Republican leaders pulled votes on the defense spending bill after failing to secure Freedom Caucus support, teeing up a possible shutdown next month.
Senators returned to Capitol Hill on Tuesday with just a few weeks before a possible partial government shutdown.
The commission's interim report lays out 13 immediate recommendations to improve the budget planning process and another 10 possible major changes.
A bipartisan group of senators seeks to boost defense spending beyond the debt ceiling cap amid resistance from House Republicans.
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