WASHINGTON, DC, USA (AP) — Hillary Clinton may not be accumulating the type of early-vote advantage her campaign wanted, but she continues to maintain an apparent edge over Donald Trump, with roughly one-fourth of all expected ballots cast in the 2016 election.

The Democrat’s campaign once hoped to bank substantial votes from Democrats in North Carolina and Florida before election day. Both are must-win states for Trump.

But data about the early vote suggest she’s not doing as well as President Barack Obama in 2012. Ballot requests from likely supporters have been weak in parts of the Midwest, and African-American turnout has fallen, too.

Still, the tens of millions of early votes cast also point to strength from Democratic-leaning Latino voters, potentially giving Clinton a significant advantage in Nevada and Colorado. With more than half the votes already cast in those states, Democrats are matching if not exceeding their successful 2012 pace, according to data compiled by The Associated Press.

“We are seeing the trajectory of the election change in some states, but Democrats are also making up ground,” said Michael McDonald, a University of Florida professor and expert in voter turnout.

Early voting — by mail and at polling stations — is under way in 37 states. At least 33 million votes have been cast, representing about 25 per cent of the total votes expected nationwide if turnout is similar to 2012. In all, more than 46 million people — or as much as 40 per cent of the electorate — are expected to vote before Tuesday, according to

AP data.

The results of those votes won’t be known until polls close next week. But early voting data — party affiliation, race and other details — are being carefully examined for clues about the ballots that have been cast so far.

A look at the latest trends:

Race tightens in North Carolina, Florida

In North Carolina and Florida, Democrats did better with mail balloting than they had in previous elections. They expected to build on that with the start of in-person voting, where Democrats traditionally do well. But the big turnout, especially among black voters, hasn’t yet happened.

In North Carolina, with more than half of the expected vote already cast, Democrats lead in ballots submitted, 43 per cent to 32 per cent. But that’s slightly below the same period in 2012 when Mitt Romney narrowly won the state.

This year, fewer polling locations were open in Democratic-leaning counties in the first week of early voting. More locations have since opened, but Democrats are still trying to catch up. Voting by African-Americans has declined to 22 per cent of the early vote, from 28 per cent in 2012. The white vote has risen to about 73 per cent from 67 per cent.

In Florida, more than half of voters have already cast ballots. Democrats remain virtually tied with Republicans. At this point in 2008 and 2012 Democrats held an advantage in ballots cast. Obama won the state both years.

The black share of ballots is down, while the Latino share is up.

Democrats and Republican analysts say they see signs that Republican early voters are those who previously voted on election day, while Democrats are drawing new voters. That would be good news for Democrats.

“I’m still bullish that Clinton will get to the 270 electoral votes” needed to win the White House, said Scott Tranter, co-founder of the Republican data firm Optimus.

Rising Latino vote may boost Clinton

Latinos may be providing Clinton with support she needs in key western states.

In swing-state Nevada, where half the total ballots have been cast, Democrats lead with 43 per cent to 37 per cent.

That’s comparable to the party’s share at this point in 2012, good news for Clinton since Obama ultimately won the state by six percentage points. Ballots from Latinos and Asian-Americans — another group that tends to vote Democratic — are up, while ballots from African-American and white voters are down.

More than 1.2 million residents have cast ballots in Colorado, or half the expected vote. Democrats hold the advantage, 37 per cent to 35 per cent. Colorado, for the first time in a presidential election, is voting mostly by mail. At this point in 2012 Republicans held the edge.

In Arizona, where more than half the votes have been cast, Democrats trail by five percentage points. But at this point in 2012 Republicans had opened a 10 percentage point lead. The share of independent voters or those whose party affiliation is unknown is also up slightly.

Turnout rose among all races, but at higher rates among Hispanics.

“Arizona is close,” Tranter said.

In Republican-leaning Texas, 3.3 million votes have been cast in the top 15 counties, up 36 per cent. The state does not present breakdowns by party. Voter modelling by Catalist , a Democratic analytical firm, found ballots increasing by all race groups, but at sharper rates among Latinos.

Whites buoy Trump in Ohio, Iowa

Trump may hold an edge in Ohio and Iowa, two states he’s counting on to reach 270.

In Ohio, the heavily Democratic counties of Cuyahoga and Franklin are posting declines in ballot requests compared to 2012, while Republican-leaning counties such as Warren have seen an increase. The state does not break down ballots by party. Voter modelling by Catalist found the white share of Ohio ballot requests was up to 90 per cent from 87 per cent. The black share fell to eight per cent from 11 per cent.

Obama won Iowa in 2012 due to his strength in early voting. This year, Democrats lead there in both ballots requested and returned, 43 per cent to 34 per cent. But Democrats are running behind 2012 levels based on requested ballots, while Republicans are mostly on pace.

But Republicans may be having trouble flipping another state, Wisconsin, that voted for Obama in the last two elections. Overall turnout in Wisconsin is outpacing 2012, with bigger shares coming from major Democratic counties such as Dane and Milwaukee.

Defending Republican turf

Trump also may be holding ground in two Republican-leaning states that Clinton targeted.

In Georgia, the number of ballots submitted has increased mostly among whites, while the black share has declined.

In Utah, Republicans lead in returned ballots, 46 per cent to 15 per cent; no party voters made up 35 per cent. The Republican share in ballots is down from 2012 but improved from a week ago.