In agree. His meaning CLEARLY is that disagreement with a SCOTUS legal opinion is not a basis for impeachment. Just as a Senator would not be subject to impeachment for voting for or against a particular bill.
However, a Senator can be voted out of office at the next election. We have no way of getting rid of these power-mad justices except death, and it seems that takes forever. I can't imagine our founders would have approved of 5 unelected judges running our country.
The difference being that there is no other way to remove a SC Justice, while a Senator can be removed at the next election, perhaps even in her own party's primary. Impeachment is the "nuclear option" with regards to rogue judges and justices. There is no other check on their power, once they are appointed. The Constitution provides that they serve "during good behavior", so it would seem that "bad behavior", whether in court or outside of it, can form the basis for impeachment.
Actually Senators are NOT subject to impeachment. Each House has the ability to try and expell a member.
A headline is just that, a concise attention-getter.
Rehnquist's entire quotation was included in my comment FOR ALL TO SEE UPON OPENINT THE THREAD, so you guys have nothing to complain about. Unless you're blind.