According to the rules, Republicans can request to call witnesses and issue subpoenas at Intelligence Committee hearings, but the requests can be vetoed by Chairman Adam Schiff, a similar arrangement to previous impeachment proceedings.
The president and his legal team will also be able to mount a defense and cross-examine witnesses in the House Judiciary Committee, which will draft any articles of impeachment. That, too, will need to be approved by Judiciary Chairman Jerry Nadler (D-N.Y.).
Republicans have sought to address that issue by shuffling committee assignments to potentially move Rep. Jim Jordan, now the ranking member of the Oversight Committee and one of Trump’s most loyal attack dogs on the Hill, to the Intelligence Committee for the duration of the inquiry.
In the meantime, GOP lawmakers say they’ve been asked to submit a list of witnesses they’d like to call by Saturday.
Trump’s tweet on Thursday also reprised his attacks against career officials who have testified against him thus far in the probe, who the president and his allies have dismissed as “never Trumpers.” Trump has also referred to some of his critics more broadly as “human scum.”
The first hearing, set to take place Nov. 13, is expected to feature William Taylor, the top diplomat in Ukraine, and George Kent, a deputy assistant secretary of State — two key figures in the Ukraine scandal endangering Trump’s presidency. Both men are currently still a part of the Trump administration. Two days later, Marie Yovanovitch, who was pushed out as the U.S. ambassador to Ukraine after a smear campaign backed by Trump, is slated to testify.