Trump’s crude disdain for the slain filmmaker was undoubtedly rooted in the fact that Reiner so ably used his talents to help dethrone him in 2020.

Renowned director Rob Reiner and his wife, photographer Michele Singer Reiner, were found dead in their Los Angeles home on Dec. 15. Their 32-year-old son, Nick Reiner, has been arrested. Reiner, 78, ...