Opposition to Supreme Court nominee Brett Kavanaugh has increased in the days following a claim that he sexually assaulted a woman when they were both in high school.

Last month, only 29 percent of voters opposed the Kavanaugh nomination, but a Wall Street Journal and NBC News poll reported Thursday that a month later, and after Christine Blasey Ford’s accusations emerged, 38 percent now oppose the nomination.

In August, over a third of voters said that they don’t know enough about Kavanaugh to express an opinion, but in the poll conducted Sept. 16-19 only 28 percent of voters are now unsure if they do or don’t support Kavanaugh.

The poll has a margin of error of plus or minus 3.6 percentage points.

The shift in voters’ opinions in the last month came after Ford accused Kavanaugh of drunkenly groping her at a high school get together 36 years ago. Kavanaugh denied the allegations and two classmates identified as being present at the gathering denied knowledge of the incident and claimed they do not remember the gathering where Ford said she was assaulted.

Ford shared her story with lawmakers and media earlier this summer, but did not make the allegations public until a few days before the Senate Judiciary Committee was set to vote on Kavanaugh’s confirmation.

Committee Chairman Chuck Grassley, R-Iowa, has invited Ford to testify before the panel, and her legal team has said she could testify next week under certain conditions.