Most of them voted during a period when Clinton had a national lead — a narrow lead, if they voted a few weeks ago or a large lead if they voted more recently. So while it's probably not a surprise that early vote tallies in several swing states show a shift to the Democrats since 2012, it still means that Clinton has a greater percentage of banked votes than President Obama did at this point four years ago.
State by state, there’s some definite good news:
Democratic early turnout has stayed steady in North Carolina compared to 2012, while Republicans have dropped by about 14,500. In Nevada, Democrats have a smaller early voting deficit today than they did at this point in 2012. And Democrats are slightly ahead in Arizona in the early vote so far, though they are lagging Republicans in the tally of how many Arizonans have requested ballots.