I agree with quite a lot of it, especially the point that statewide elections, etc. are vital. However, I think Matthew Yglesias radically underestimates the grassroots movements surrounding Sanders. We’re vastly more powerful, widespread and strategic-minded than the establishment media knows (and/or wants to research/report) and we’re only getting more powerful/dynamic over time.
The plan to unseat obstructionists (local and statewide) beyond electing Bernie is common knowledge among most supporters. Go to any rally or meeting and ask around – it’s the plan.
Bernie repeats it like a mantra and it’s taken to heart by most supporters.
LINK
Planning voter outreach/drives was one of the most important components of the historic, nationwide July 29th meeting.