All 10 Democratic members of the Senate Judiciary Committee sent a letter Wednesday to Chairman Charles Grassley Charles (Chuck) Ernest GrassleyGOP lawmakers distance themselves from Trump comments on transfer of power The Hill's 12:30 Report: Ginsburg lies in repose Top GOP senators say Hunter Biden's work 'cast a shadow' over Obama Ukraine policy MORE (R-Ia.) urging that he postpone Thursday's hearing where Supreme Court nominee Brett Kavanaugh and a woman accusing him of sexual assault are set to testify.

The Democrats also called for Grassley to postpone a planned committee vote on Kavanaugh's confirmation hearing and that he support an FBI investigation into sexual misconduct allegations against the nominee in the wake of a third accuser's statement.

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"It would be an unprecedented abuse of power and abdication of our constitutional responsibilities to move forward with this nomination given the concerns about Brett Kavanaugh’s character and actions," the letter said.

"We ask that you immediately request an FBI investigation or support the withdrawal of this nominee, but at a minimum the vote that has been scheduled for Friday must be canceled."

Michael Avenatti, the attorney who represented Stormy Daniels in her case against Trump, released a declaration from a woman named Julie Swetnick on Wednesday. Swetnick said she witnessed Kavanaugh engage in abusive and physically aggressive behavior toward girls at parties she attended in the early 1980s.

Kavanaugh has denied the charges.

Grassley said earlier Wednesday that he is still planning on following through with Thursday's hearing.

"I feel like I have a definite responsibility to hold a hearing, not only for (Blasey Ford) but for Judge Kavanaugh," he told reporters.