The reason for this that I rather suspect they are going to be named defendants in one or more lawsuits filed by Roy Moore or his wife and they will have to recuse their scumbag selves from the proceedings.
An ethics investigation would need to have some current accusations and it appears there are none but these 40 year old + Gloria Allred smear. Which puts truth to the lie that is implicit in the Democrat / Media / GOPe manufactured “outrage”. Bob Menendez is accused and still being tried for things that are happening TODAY ... crickets!