Your point number 4 is excellent. Makes perfect sense and completely fits with Trump methodology that we’ve seen so often.
https://en.wikipedia.org/wiki/Jeff_Sessions
https://www.gobankingrates.com/net-worth/politicians/jeff-sessions-net-worth/
$6-8 million net worth. Sources seem legit, but I didn’t dig any deeper than reading a few links as above.
The only drawback I see is that Trump will need to keep up the charade until after the new congress is sworn in.
Sessions, if he wins, will be free to support Trump and promise his loyalty but Trump must note respond in kind.
Other than the obligatory, “Congratulations. We should be able to work toward common goals in the future.”