Speaking simply technically, yes, Porter ravaged his voice with years of bad technique. A similar thing can be said of Alice Ripley and Tonya Pinkins, but blame for their damage must be shared by Tom Kitt and Jeanine Tesori, who wrote scores for them that encouraged bad technique.
I, too, was very concerned for him during his big Shuffle Along number; he tried to hide the fact that he couldn't handle it vocally by employing a distracting and elaborate physicalization, but the voice just wasn't there.
Updated On: 3/10/17 at 10:24 AM