The kind that’s easy to knock down:

I read with interest your article in the latest issue of National Review, on why senators shouldn’t vote for Sotomayor and don’t owe the president any deference. It is well argued but I can’t help thinking that it would be more convincing if you had ever said anything similar when deference to President Bush’s nominees was the issue.

I did make essentially the same case against deference in 2005, in the context of the nomination of John Roberts. Senator Jeff Sessions criticized my article during his opening statement at Roberts’s confirmation hearing.