This is an unconstitutional investigation at this point in time. If Congress has any balls, they'd bring in Mueller and question him under oath. He's moved into some very gray areas of unconstitutional overreach. Congress must be involved, to protect the constitution and office of the President.
By the way...
Have you ever thought about why Mueller and his team of Clintonite attorneys do not want to get to the bottom of the Russian dossier?
Or...
Why aren't they looking into the illegal and unconstitutional unmaskings made by Susan Rice, Ben Rhodes, Samantha Powers, Brennan and Clapper...then they leak those names, and leak President Trump's phone conversations?