The New York state Assembly’s impeachment investigation against Gov. Andrew Cuomo is nearing its end, attorneys conducting the probe said Thursday as the third-term governor continued to defy widespread calls for his resignation.

The law firm Davis Polk & Wardwell is leading the impeachment investigation and gave Cuomo’s legal team an Aug. 13 deadline to present any extra evidence. In a letter, the firm warned that the state Assembly “will soon consider potential articles of impeachment against your client.”