Most South Carolina primary voters had made up their minds over a month ago

According to the exit poll, 60% (or 3 out of 5) of South Carolina Democratic primary voters said that they had made up their minds on whom to vote for more than a month before casting their votes.

So it seems that a large percentage of South Carolina voters had already decided even before the Iowa Caucus and before the recent spate of announcements of Clinton endorsements by prominent African-American leaders like Reps. Jim Clyburn and John Lewis--at least, that is, if the poll participants are to be believed.

Another 25% (or 1 in 4) only made up their minds in the past week (that is, 8% on the day of the election, 7% within "the last few days," and 7% "the last week&quot .

Interestingly, although Clinton did better overall even with those who decided within the past month, the margin of her win among them was not as great as it was among those who had already made up their minds before that.
Clinton won 76-24 among those who'd decided more than a month ago, but only 61-38 among those who decided in the last month (but more than a week ago).

http://www.nytimes.com/interactive/2016/02/27/us/elections/south-carolina-democrat-poll.html


Looks like maybe Sanders was starting to pull off a few votes from the swayable pool in the last few weeks, perhaps after his strong showing in Iowa and New Hampshire suggested his candidacy was more viable than the beltway has generally allowed.