Possibly, but I am not there yet.
Papadopoulis has been cooperative in identifying his contacts overseas that interacted with and in identifying what he did in the campaign. If he had just pled the fifth the FBI would not have any of that so he has been cooperative there. But again, this whole thing is about getting Trump and it has not been established yet that his freelancing adventures as a volunteer reach to trump.
Mueller will try to get Jared and Don Jr. too. This is a full blown witch-hunt/war and in war there are going to be casualties. That does not mean you the other side wins unless it wins.
That is why we need a special prosecutor for Hillary. This is a full-blown fully partisan witch-hunt and the republicans are foolish to not recognize it as such and stop klutzing around hoping and pretending that Mueller is serving both sides. He is not. He wants Trump.
We just learned today about Papadopoulos and his contacts with the Russians and them conspiring to undermine the Clinton campaign with stolen emails, all with the knowledge of a campaign “supervisor” and you think Mueller is focused on overseas contacts? No.
There’s a bunch of people in and around the White House peeing in their pants as we speak.