Today, Democrats go to the polls in ten states. With 865 pledged delegates at stake in the Super Tuesday primaries and caucuses — along with an additional 150 superdelegates — today’s contests will determine about 23 percent of the total delegates to the Democratic National Convention in July, where the party’s nominee will ultimately be decided.

Hillary Clinton leads in almost every state except Massachusetts, Colorado, and Vermont, enjoying especially high support in southern states like Georgia and Alabama. The other exception is Oklahoma, where Clinton and Bernie Sanders are virtually tied. Two weeks ago, polls reported that Sanders was projected to receive 44 percent of the vote, just a couple points behind Clinton’s 46 percent — well within the margin of error. Polls released yesterday show a five-point lead for Sanders — 48 percent to Clinton’s 43, with 8 percent undecided — but this difference also falls within the margin of error.

Politically, there’s much to distinguish the two presidential contenders. Clinton represents the conservative mainstream of the Democratic Party, while Sanders’s campaign has been likened to an insurrection within party ranks. While Sanders proposes ambitious reforms like single-payer health care and free higher education, Clinton promises a continuation of Obama administration policies, emphasizing her political savvy and experience as secretary of state.