Only 15 minutes into what is expected to be a three-hour cross-examination, Judge Arthur Engoron snapped at defense lawyer Jesus Suarez for asking redundant questions.
"I see why this is going to take two or three hours. Some questions become three or four more questions," Engoron said, interrupting the cross-examination to request that Suarez shorten his questions.
That prompted Trump lawyer Chris Kise to criticize Engoron for placing an unfair standard on the defense team.
"You never give them speeches. You never limit their questions," Kise said about Engoron's approach to the attorney general's legal team. "I think it's unfair."
Kise stressed that the cross-examination of the state's sole expert witness is particularly important since his testimony is likely to play into the judge's calculation of Trump's potential fine.
"This witness is the only witness they have that even hints ... about ill-gotten gains," Kise said.
Engoron, however, refused to back down.
"I stand by my rulings and statements," the judge said.