A new poll suggests that Green Party presidential candidate Jill Stein is drawing more voters from former President Donald Trump than from Vice President Kamala Harris.

According to a Noble Predictive Insights survey released last week, Harris holds a narrow lead over Trump in a hypothetical three-way race. With Stein on the ballot, Harris’ lead expands, pointing to a potential spoiler effect similar to what many Democrats blamed Stein for doing to Hillary Clinton in the 2016 election.

For Trump, the emergence of Stein as a potential spoiler may be a critical factor in battleground states, where even a small shift in votes could determine the outcome. For Harris, Stein’s candidacy could paradoxically provide an unexpected advantage, drawing votes from Trump and narrowing his pathway to victory.