You're correct, it used to be a plurality, only recently has that shifted to "Independent." I hadn't seen those numbers in a while. Although registered Dems still outnumber registered Repubs about 4 to 1.

https://www.washingtonpost.com/news/the-fix/wp/2014/05/06/just-7-percent-of-journalists-are-republicans-thats-far-less-than-even-a-decade-ago/