Reader Q&A: how united are the Democrats ahead of the midterms? Post your questions now

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Who are the Democrats running in the midterms, and where do they stand? Our political reporters will be hosting a series of conversations on the critical issues ahead of November. First up: the state of the Democrats, the party’s moderate and left wing candidates and key races to watch. Drop your questions and join us live at 12pm (EDT) on 16 September