Karl Rove...why is he so untouchable?

Is the U.S. Congress slipping in its responsibility to make Karl Rove appear getting less and less importance? He is appearing all over the country and still he has not been picked up for Contempt of Congress. Regular citizens have tried and failed but at least they have more guts to do what Congress won't do. Making a citizen's arrest which is the right of all citizens have proved to no avail. What is one to do when we as Americans recognize that there are two systems of justice in this country. The Democrats who are supposed to be in control seems to be stymied by any attempt to get him to testify. If an ordinary citizen were to ignore a subpoena to appear, they would be breaking down the door to make sure that you do. When are the Democrats and Republicans going to do the right thing. Does Mr. Rove have a immunity cloak around him that makes him untouchable? He needs to be held accountable for issues that needs to be addressed that may point to the impeachment of the present administration. Is there anyone out there who might have the solution of this very pressing issue?