An Associated Press count of pledged delegates won in primaries and caucuses and a survey of party insiders known as superdelegates shows Clinton with the overall support of the required 2,383 delegates.
Clinton downplayed the report in a tweet Monday night.
"We're flattered, @AP, but we've got primaries to win. CA, MT, NM, ND, NJ, SD, vote tomorrow!" Clinton said in a tweet.
Clinton's campaign manager Robby Mook released a statement similarly de-emphasizing the AP report.
Clinton's campaign wants to make sure people vote tomorrow. AP's call seems to have gotten ahead of their plans. pic.twitter.com/nd1Nz9dfAz
— Tamara Keith (@tamarakeithNPR) June 7, 2016
According to FiveThirtyEight's Nate Silver, Clinton will likely clinch a majority of pledged delegates during Tuesday's batch of state contests.
Tomorrow, Clinton will also clinch a majority of ELECTED delegates unless Sanders wins every state by 40 points.
— Nate Silver (@NateSilver538) June 7, 2016
California, Montana, New Jersey, New Mexico and South Dakota all hold primaries Tuesday, and North Dakota holds a caucus.
Assuming that the AP's count holds, Clinton will formally accept her party's nomination in July at the Democratic National Convention in Philadelphia.
Bernie Sanders, Clinton's Democratic rival, has vowed to stay in the race until the convention in hopes he can convince superdelegates to switch to his side. Sanders has argued he is the stronger candidate to take on presumptive Republican nominee Donald Trump in the general election.
"It is unfortunate that the media, in a rush to judgement, are ignoring the Democratic National Committee's clear statement that it is wrong to count the votes of superdelegates before they actually vote at the convention this summer," Sanders campaign spokesman Michael Briggs said in a statement Monday.
