But he's done something else, too, and that's issue an extensive set of policy proposals on education, economic development, public safety, health, the environment, arts and more that at least rival — and in some cases easily surpass — those from so-called mainstream candidates in their depth and scope. They are ambitious and leave gaps in some key points, particularly in terms of how the city is going to pay for them or get lawmakers in Annapolis and Washington to support them where necessary, though Mr. Mckesson is hardly the only candidate to be guilty of that sin. But what's surprising about the platform, given how recently Mr. Mckesson has arrived on the scene, is the depth of knowledge it displays about how things have been done in this city and how they could be done differently. His ideas aren't always the right ones or necessarily better than those proffered by other candidates, but they're no joke either.