This is exactly what we are looking for. McConnell says he doesn't think a filibuster can be sustained. He is not given to loose talk. Graham says that the gang of 14 did not think they were agreeing that any SC nominee would be an extraordinary circumstance. Graham wants to go back to the old days of comity when the Senate gave the President's nominee deference. He can pretty much forget that.
It has less to do with political affiliation and more to do with judicial philosophy. Conservative judges favor greater adherence to letter of the law, i.e., the Constitution, and not legislating from the bench. Liberals prefer judicial activists who "interpret" the Constitution and apply it to issues, which can't be won through the legistlative process.