Initialiation Ceremony; or, Acronymble Drumpf

Tri-initial'd superstar...? 
I guess the first was FDR.
The next...? A sorta double play: 
Frick (JFK); Frack (RFK). 
Folks all recall these soubriquets: 
MLK, Jr's; LBJ's. 

Who reigns as distaff VIP...? 
There’s RBG; there's AOC. 
Who’d also play...? The GOP -- 
with ACB 'n' MTG. 
And now here's Drumpf to ply his plea: 
“I'm He Who Be: I'm DJT!”

Parenthetical Coda

(Bush...? Don't let him trouble ya.

Quotes George, "I'm but a W.")