Take the Thompson Challenge

Freddie T's unorthodox exit from the Republican field has generated some head-scratching:

Fred didn't hold a press conference or go on a show or even put out a youtube video announcing his departure from the race. He just sent out a half-dozen line press release. I'm out. Bye. Thanks. A few more words, but not many ....

So here's the question, can anyone remember a major presidential candidate not holding some sort of public event to announce he or she was out? Not a press conference, TV appearance, not anything?

I cannot think of one. Fred Thompson seems to be breaking new ground.