Frum is the kid that nobody wanted on their team. All he can do is stand on the sidelines while he watches the others play.
Its not about Frum. He talks about wide spread criticism of the choice. FreeRepublic is very sceptical as well. I did not see a poll here, but reading the many threads can predict a large % of disapproval votes.
Laura Ingraham, Rush Limbaugh, George Will, Patrick Buchanan, Charles Krauthammer, William Kristol, Michelle Malkin, Ann Coulter, Bill Bennett and many more are against, and Marc Levin and Sean Hannity are not happy but explaining the choice by the Senate's weak knees. Hugh Hewitt and Michael Medved are cautiously optimistic. The critics group is diverse enough to have respect at least to some of them.
So, the problem is much bigger than just Frum.