Maryland will elect a governor and a new General Assembly on Tuesday, but already more than 300,000 Marylanders have cast their ballots. The state has expanded early voting over the last few election cycles. Political scientist Paul Gronke from Reed College's Early Voting Information Center says campaign operatives across the political spectrum have embraced early voting in this year's election. But, he tells WYPR's Fraser Smith, exactly how much early voting impacts election outcomes remains unclear.