Senator Bernie Sanders and Hillary Clinton are tied for support among Democrats, according to a national Reuters/Ipsos poll released Tuesday.
In the Democratic race, Clinton and Sanders each had 48 percent support, according to responses from 719 Democrats polled from April 8-12.
Clinton had been leading for months, but Sanders began to close the gap in February.
The results are also important in that they measure support amongst Democrats ahead of the closed primary in New York next week. Sanders typically does better in states that hold open primaries, where voters who are not registered as Democrats can also participate.
Clinton has recently ramped up her attacks on Sanders, who has won the last eight out of nine contests.
The former secretary of state still holds a lead in delegates, though Sanders' recent wins have served to slightly close the gap.
The momentum Sanders has accrued from the winning streak has been cutting into Clinton's lead both in New York and California, two of the most delegate-rich states in the Democratic contest.
The Sanders campaign has said they aim to seize the party's White House nomination from Clinton's grasp with a last-ditch come-from-behind triumph in California.