There isn’t one under the law so no.
Why wasn’t the whistleblower process followed? Why didn’t he try to contact his congressman/ senator ? He could have said I don’t want a clearance anymore and disclosed his concerns. He could have reported anonymously even.
He wanted public debate and discourse on something that the process didn’t allow
What he exposed was found illegal by US courts. And the govt had to stop it. What more evidence do you want?