So far at least. Here’s Jake Tapper:

@RumsfeldOffice Mr. Secretary, I’d like to see you use some emoticons every now and then. OK? :)

And here is the former SecDef:

From now on I will add an emoticon in response to reporters who tweet questions I find disappointing, uninformed or both. @jaketapper :(

I like Jake Tapper, but he teed himself up for that one.