The top Republican on the Senate Armed Services Committee is pushing to give the president authority to use all necessary force against Islamic state militants in Iraq and Syria.
Sen. Jim Inhofe of Oklahoma is circulating a draft of a resolution to authorize military force and is seeking bipartisan support as Congress returns to Washington next week.
The resolution also forces the president to submit a strategy to Congress within 60 days on how to defeat the Islamic State group.
The Senate has a shortened session in September, and it is unclear whether lawmakers will act on any resolution. But the Senate still has not voted on the annual defense policy bill, and Inhofe's resolution could be part of that debate.