It was a very long Tuesday night for voters and candidates alike in Baltimore and across the state, after Marylanders headed to the polls to cast ballots in statewide primaries. In Baltimore, voters chose their picks in three powerful citywide races. But because of issues with Maryland’s mail-in voting system, there are no firm results for those races just yet. WYPR’s Emily Sullivan talks to Nathan Sterner about what we know — and what we don't.