A letter:

There’s one question that no one seems to have asked McCain about judges: will he apply his “reach across the aisle” attittude to SCOTUS nominations? Or put another way, is McCain going to be the Senate’s man in the White House, or is he going to stand his ground on nominations?
It’s frustrating to me that no reporters (or anyone else) have asked these kinds of questions of McCain. Here’s the long version of the question:
If you are president when the next Supreme Court vacancy occurs, and you seek advice and input about who would be a good nominee, will you ultimately nominate the person who you believe would do the best job on the Court, or would you instead seek a consensus nominee who you think will best satisfy yourself and fifty or sixty United States senators?
I have absolutely no clue how McCain would answer this.

Me neither. His remark that consulting with senators is required by the Constitution was not a hopeful portent, but perhaps that remark does not reflect his considered judgment.