As far as I can tell, President Obama’s press release starting Pride Month is the first time the T has been mentioned as part of the gig! Back in 2000, Clinton used the “gay & lesbian” terminology.
What’s interesting to me is that this change in terminology IS a sign or progress. It can be hard doing the work, waiting for things to change, & while having the POTUS acknowldged the T may seem like small fry (say, compared to a gender-inclusive ENDA passing), but it is something.
(h/t to Josie!)