Sentence:  State Party Chairman James W. Dorsey added that enthusiasm was picking up for a state rally to be held Sept. 8 in Savannah at which newly elected Texas Sen. John Tower will be the featured <WSD>speaker</WSD> . 
Meaning of the word marked with <WSD> tags:  someone who expresses in language; someone who talks (especially someone who delivers a public speech or someone especially garrulous)