On The Gist, an important update on the Brexit. Then, William Galston joins us to discuss the practical considerations for executing a Bernie Sanders agenda. Can it be done from the executive branch alone? Galston is a senior fellow in Governance Studies at Brookings, and a regular columnist for the Wall Street Journal. For the Spiel, why does Morning Joe hate Marco Rubio? Join Slate Plus! Members get bonus segments, exclusive member-only podcasts, and more. Sign up for a free trial today at slate.com/gistplus.

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