Adjective: Reigning, Dominant or ruling.

Example 1: “King Charles is Regnant in the UK.”

Example 2: “Unfortunately Trump is regnant in the USA.” WWIT about Trump II

The photo is of a postcard written in 1954 about the joy of seeing the wild black bears being fed in the campgrounds in Yosemite Valley. It was in the small museum in Yosemite Village. Times change.