John Bolton, et al.

Take your pick:

The left's tactic of blocking Bush's nominees is:

1. supposed to lay ground for arguing that he hasn't done anything;

2. all they have left to offer their base, spite;

3. an attempt to show that they still matter;

4. pointless and futile, like terrorism;

5. an attempt to protect ground gained with bad legal precedent;

6. all of the above.