From the NYT:

Beneath Hillary Clinton’s Super Tuesday Wins, Signs of Turnout Trouble

By NICHOLAS CONFESSORE MARCH 2, 2016

Hillary Rodham Clinton set out 10 months ago to inspire and energize the Democratic Party, hoping to bring together the rising American electorate of black, brown, young and female voters into a durable presidential coalition. But buried beneath Mrs. Clinton’s wide-ranging and commanding victories on Tuesday night were troubling signs of a party that has not yet rallied to her call.

Democratic turnout has fallen drastically since 2008, the last time the party had a contested primary, with roughly three million fewer Democrats voting in the 15 states that held caucuses or primaries through Tuesday, according to unofficial election results. It declined in virtually every state, dropping by roughly 50 percent in states like Minnesota and Texas. In Arkansas, Alabama, and Georgia, the number of Democrats voting decreased by roughly a third.

The fall-off in Democratic primary turnout — which often reveals whether a candidate is exciting voters and attracting them to the polls — reached deeply into some of the core groups of voters Mrs. Clinton must not only win in November, but turn out in large numbers. It stands in sharp contrast to the flood of energized new voters showing up at the polls to vote for Donald J. Trump in the Republican contest. …

In three precincts of Virginia’s Third Congressional District, the heart of the state’s African-American community, where overwhelming black turnout in 2008 helped Mr. Obama win the state, turnout was down by an average of almost 30 percent on Tuesday night. …

In Nevada, exit polls suggest that Hispanic voters — who have helped push the once deeply Republican state toward Democrats in national elections — voted in significantly lower numbers than in 2008.

Even Mrs. Clinton’s strong victory in South Carolina, which was celebrated for her dominance among African-American voters, obscured a big decline in black turnout of about 40 percent. In Iowa, where Mrs. Clinton eked out a narrow win after a hotly fought battle last month with Mr. Sanders, exit polls suggested that turnout for voters under the age of 30 dropped by roughly 40 percent from 2008.

The results suggest that Mrs. Clinton, who has outraised every other presidential candidate and has the overwhelming support of her party’s elected leaders, still faces a daunting and difficult road to reassembling the winning Obama coalition.

The [debate] schedule, widely interpreted as an effort by Ms. Schultz to help Mrs. Clinton, instead meant that many Democrats never saw some of the candidates’ most vigorous discussions of racial discrimination, overincarceration and police violence.