I am in favor of investigating. If it smells like smoke, stir the coals and see if there is flame or if the smoke dissipates. Powerful people are often lawless until caught. Maybe that (in the long-term) is how they get to be powerful. But, they are never so powerful, they deserve a free pass to be lawless. It is up to the three branches to watch the other branches. This is the way it has always been. We elect officials that are supposed to favor this oversight, lest on branch become supreme over the others and the country as a whole. Nobody should be elected to give their side a free pass, without scrutiny. People that support that are no better than traitors to their country, while sucking off the government tit for money and power.