Latest "military border mission" stories
Military officials said they are looking into disparities in what benefits active-duty and part-time troops earn for similar work.
Pentagon officials announced thousands more troops headed to the border just hours after a congressional hearing on the topic.
Democrats have said such a move would violate a host of rules, and they'll move next year to pass legislation ending the idea.
The military will have met initial the DHS request within the next week, but forces will remain through the holidays, at least.
By Tara Copp, AP