Democrats have vowed to keep forcing votes on the issue as they seek public testimony from administration officials.

The measure, which would have blocked President Trump from continuing military force against Iran, fell short of the simple majority needed to advance.

The eventual ask of Congress is likely to fall to between $80 billion and $100 billion, officials said, less than half the amount of an earlier proposal to offset costs of the conflict.

The military campaign has killed Supreme Leader Ayatollah Ali Khamenei, sunk at least 10 Iranian warships and struck more than 1,000 targets.