According to the latest data from a leading pollster, Kamala Harris’ lead in the polls has now disappeared.

After the final New York Times/Siena College In a pre-election poll conducted between October 20 and 23, Harris and Trump are tied at 48 percent each among 2,516 voters nationwide. In the pollster’s previous poll, conducted between Sept. 29 and Oct. 6, Harris was ahead by three points, a lead just outside the poll’s margin of error of plus or minus 2.4 points.

The New York Times and Siena College are ranked as the most accurate pollsters by FiveThirtyEight. Newsweek emailed the Trump and Harris campaigns seeking comment.

The latest poll is bad news for the Harris campaign, which is struggling to gain a lead over Trump in one of the closest elections in modern history.

In recent elections, Democrats have often been ahead in the popular vote, even in years when they ultimately lost the Electoral College and the presidency.

However, polls show Harris and Trump virtually tied two weeks before Election Day, with Harris narrowly ahead of her opponent in FiveThirtyEight’s poll tracker, giving her a 1.7-point lead nationally – within the margin of error.

To win, Harris must win the Electoral College, which depends on winning some or all of the seven battleground states, and the popular vote does not decide.

Polls show Harris’ margins in battleground states have shrunk over the past month.

According to 538’s tracker, Harris leads in Michigan, Wisconsin and Nevada by narrow margins of between 0.1 and 0.7 points. A month ago, she led the three states by as much as 2.4 points. Meanwhile, Trump is ahead by 1.2 to 1.8 points in North Carolina, Arizona and Georgia. He also leads by 0.2 points in Pennsylvania, where Harris has been in the lead since his rise to the Democratic leadership.

Given the tight state of the polls, Electoral College projections have changed in recent weeks, showing that the probability of a Trump victory is greater than that of a Harris victory. For example, Silver’s current forecast has Trump having a 53.1 percent chance of winning the Electoral College election, while Harris has a 46.6 percent chance.

FiveThirtyEight’s forecast has also shifted in Trump’s favor, showing he has a 51 percent chance of winning the election, compared to Harris’ 49 percent. RealClearPolitics’ forecast currently shows Trump is expected to win in every battleground state, giving him 312 Electoral College votes to Harris’ 227 votes.

But it’s not all bad news for Harris. Some recent polls, including polls from YouGov and Morning Consult, have given Harris a lead of as much as 4 points. The most recent TIPP Insights poll, conducted between Oct. 21 and Oct. 23, showed Harris leading by three points.

The New York Times/The Siena College poll also showed some encouraging signs for Harris. The vice president has narrowed the gap with Trump on the economy, which remains the top issue for voters. In last month’s poll, Trump had a 13-point lead over Harris on the question of which candidate could better manage the economy. That has shrunk to 6 percentage points.

Harris also has a 16-point lead over Trump when it comes to which candidate would do better on protecting abortion access, a key issue in her campaign. And the poll also shows there is room for Harris to attract more supporters, with 15 percent of voters still undecided, a group that Harris leads by 10 points. Two weeks ago, Trump had a narrow lead among undecided voters at 36 percent to Harris’ 35 percent.

But polls showed Trump still has a lead over Harris on immigration, the cornerstone of his campaign. Fifteen percent of respondents named immigration as their most important issue, up from 12 percent in the last poll, and 54 percent of voters said they trust Trump more than Harris on the issue, compared to 43 percent who said the same about Harris.

However, the polls are so close that the race remains uncertain, said Jon Parker, a lecturer in American studies at Keele University in the United Kingdom Newsweek last week.

“The race went from almost completely back and forth to definitely back and forth,” he said. However, he added that this “does not suggest that either campaign will win or lose.”