'This is a temporary mission for us,' Sec. Hegseth said. 'We expect the world to step up.'
The crews of all three merchant vessels seized by the U.S. military over the past week are still in U.S. custody.
It is unclear the spending request would have support.
The briefing comes as the conflict has intensified into a wider war in the region.
Minneapolis Mayor Jacob Frey described the situation as not “sustainable.”
Earlier, the West Virginia governor said the guardsmen had died but now says he has received 'conflicting reports' about their conditions.
Nevada Reps. Susie Lee and Steven Horsford have both indicated that they will both vote no on the funding deal.
Senators questioned whether the former combat veteran and TV news show host is fit to lead the military.
President-Elect Donald Trump is considering a replacement for his embattled defense secretary nominee Pete Hegseth.