This story struck a chord in me with regards to POTUS' tweets concerning Mattis. Could "bring home the bacon" be referring to MIA soldiers? Because, hasn't Trump had to step in (most notably in North Korea) to get the job done himself?

https://www.military.com/daily-news/2018/09/21/never-forget-our-duty-mattis-says-push-bring-mia-troops-home-continues.html