Hillary Clinton may have secured her extremely slim victory in the Iowa Democratic caucuses Monday night thanks to several contested county delegates that were determined by flipping a coin—as in, real coins being tossed in the air—underscoring exactly how close the race is between the former secretary of state and Vermont senator Bernie Sanders, who has yet to admit defeat in Iowa and is poised to win next week in New Hampshire.

At least six caucuses were split between Clinton and Sanders, The Des Moines Register reported Tuesday, and thanks to an old, obscure Democratic Party rule, the winner of the county delegates had to be decided by a coin flip. Those up-for-grabs delegates, while not the same as the statewide delegate equivalents that constitute the final results, were factored in to the equation that determined the final tally of 700.59 for Clinton and 696.82 for Sanders. Clinton won all six coin flips, according to the Register, apparently proving Sanders’s point about the influence of money on politics. (Update: 6:00 P.M.: At least two coin-flips in Sanders’ favor were reported Tuesday by NBC News’ Frank Thorp. Later in the day, an Iowa Democratic Party spokesman told the Register that seven coin-flips were reported, but that Sanders had won six of them, contradicting earlier reporting. The paper has reached out to the state Democratic Party for a complete accounting of each coin-flip event.)

While observers knew that the race between the two Democrats would be close, no one predicted that it would be this close: by the final tally, Clinton eked out a 0.3 percent lead over Sanders. With Sanders expected to secure an easy victory in the New Hampshire primary Tuesday, Clinton just barely avoided what could have been a back-to-back loss. But equally telling for the primary race going forward is what the polling data says about what kinds of voters are supporting each candidate.

According to entrance poll data, Sanders nearly defeated Clinton with a surge of support among youth, who voted for the self-described democratic socialist by an 80-to-20 margin. The 17-to-29-year-old demographic, many of them college students, reportedly swayed fellow Democrats during the caucus process, too, while Clinton held steady with middle-aged voters, winning 60 percent of the 50-plus crowd. She also won 6 out of 10 non-white voters, a mere 9 percent of Iowans but an early favorable sign for her success in minority-heavy states, which she is predicted to carry. (Sanders, aware of this, has pledged to make inroads with African-American and Latino voters.)

But Sanders might not be able to claim that he’s pulling a Barack Obama quite yet. While Sanders outperformed Obama with young voters Monday night, only 18 percent of caucus-goers were in that demographic sweet spot. In 2008, Obama was able to win Iowa by amassing a historic turnout wherein 22 percent of voters were in the youth category and 57 percent of caucus-goers described themselves as first-time participants. In contrast, only 44 percent of voters said they were caucusing for the first time in 2016, and Clinton carried returning voters by a 2-to-1 margin.

The rest of the results fell in line with conventional wisdom. Clinton performed well with moderates, beating Sanders by 23 points, and Sanders won the “very liberal” crowd with a 19-point margin. But Clinton only carried the “somewhat liberal” vote by six points. Considering that this bloc made up 40 percent of the overall caucus vote, it’s possible that after New Hampshire, Sanders might attempt consider nibbling away at Clinton’s lead by inching closer to the center.