I never even considered flames or whatever, I truly wanted to know what you were looking for. Anyway, I looked around a little and can't seem to find any reference to democrats but did find more
Republicans. Too be honest, I do not understand it too much myself. "A secret hold is a parliamentary procedure within the Standing Rules of the Senate within the United States Senate that allows one or more Senators to prevent a motion from reaching a vote on the Senate floor. Current Senate rules allow the hold to be only temporarily anonymous." It used to be permanently anonymous but was changed recently to be '6 session days'. I dug through the official rules but could not find it so here is the
widipedia entry.