Actually, ChInA Joe is not yet Commander-in-Chief when he passes those Marines and should not be saluting them. Here is the CSPAN video of the entire day: https://youtu.be/ZwvbQR887W0
The Marine non salute event happens at about 3 hours and 30 min in
ChInA Joe swears in to become President Joe (Jinping) at about 4:47.
Great catch!
That explains why right there.
What it now shows is why Jill told him to salute them early...
...and reconstitutes my opinion that Biden was absent yesterday in some form. Jill also has 8 years as first lady around Marines and knows customs and courtesies.
Fun fact, the Marines’ for the longest had a regulation going way back that a salute also applied to single ladies, akin to knights lifting their helmet visor, I guess. My buddies and I used to salute girls in civvies when I was stationed at Lejeune. Haha.
I guess that didn’t cover presidential spouses in the WH...