Several conservative bloggers claim that the National Rifle Association has ordered its board members not to discuss the nomination of Elena Kagan to the Supreme Court. Kagan has not really expressed a public view on many issues. While this likely makes her confirmation an easy task, it also troubles many liberals and conservatives.
Because Kagan is probably the "best" nominee that conservatives can expect (short of an openly conservative pick), many conservative organizations will probably avoid a big fight and hope for the best. Perhaps this explains the NRA stance (if the reports are accurate).
Liberal groups are really the ones that should worry the most. Kagan could end up being more moderate or conservative than liberal (like former Justice Sandra Day O'Connor). No one really knows how she will operate as a judge.