The Washington Post reports that Marylanders approve of Obamacare by a 55-40 margin. The poll also says few attach blame to LG Brown but instead to state and federal administrators. One suspects that the share of Democratic primary voters who blame Brown is even lower.
I suspect that this aspect of the poll is more vulnerable to the answer choices provided. It is also unclear or whether voters deem the issue important or have fixed opinions. Campaigns also have the capacity to raise the salience of issues and to frame them in ways that opinions shift (i.e. who oversees those administrators blamed by the voters). However, the poll suggests that has yet to occur despite efforts by both AG Gansler and Del. Mizeur.