Prosecutors called Daniel Dixon, who works as a lead compliance analyst at AT&T, to testify as a custodian of records about cell phone data.

Prosecutors used his testimony to enter into evidence phone records for Michael Cohen's company phone that jurors will likely see later when Cohen testifies.

As Dixon testified, Trump leaned forward in his chair with a yellow highlighter in hand, flipping through and marking up a stack of papers.

Defense attorney Emil Bove then did a detailed cross-examination of Dixon, as part of an effort to cast any possible doubt on records related to Cohen.

Dixon then stepped off the stand, with he and Trump exchanging tight smiles as he passed the defense table.

During a short redirect examination, Trump White House aide Madeleine Westerhout confirmed that she currently works as the chief of staff for Robert C. O'Brien, who served as Trump's national security adviser from 2019 to 2021.

Westerhout then concluded her testimony.

She and Trump both smiled at each other as she stepped off the witness stand. As she passed by the defense table, Trump whispered what appeared to be a brief word of thanks to her.

Defense attorney Necheles concluded her cross-examination of Trump White House aide Madeleine Westerhout by asking Westerhout about Trump's reaction to the 2018 Wall Street Journal story about the Stormy Daniels hush money payment.

Westerhout confirmed she spoke with Trump after the story came out and recalled that "he was very upset by it."

"Why?" Necheles asked.

"My understanding is he knew it would be hurtful to his family," Westerhout said.

Part of her testimony about Trump's response was struck from the record because Westerhout could not recall Trump specifically mentioning his family.

"I could just tell that the whole situation was unpleasant," Westerhout said.

Defense attorney Susan Necheles suggested that the practice of not mailing Trump's personal items directly to the White House -- including checks for him to sign -- was a standard practice used by past presidents to quickly get their personal mail.

"It was a way that items could be sent to you and you could get them promptly to President Trump?" Necheles asked Trump White House aide Madeleine Westerhout, suggesting that security practices delayed mail sent to the White House and that packages might get lost.

"That's right," Westerhout said.

"This was a problem [that] … exists for everybody who is in that office?" Necheles later asked, suggesting past administrations used a similar solution.

"I don't have any knowledge of what is was like in previous administrations, but I can't imagine it would have been any different," said Westerhout.

Necheles also sought to contradict the prosecution's contention that Trump personally reviewed every check he signed.

"You said he signed a tremendous amount of documents ... commissions, proclamations, executive orders, memos, letters ... hundreds of documents a day?" Necheles asked Westerhout.

"Not every day, but sometimes," Westerhout said.

"Sometimes he would sign checks without reviewing them?" Necheles asked.

"Yes," said Westerhout.

Members of the public lined up as early as 12:30 a.m. to get a spot in the courtroom to see Stormy Daniels' testimony this morning.

Two friends who live in Brooklyn, who identified themselves as Shmuel and Levi, said their first attempt to watch the trial from the courtroom on Tuesday failed. They said they arrived at 3:30 a.m. but could only secure a spot in the overflow room, so they changed their approach this morning.

"We went back home last night ... and decided to come at like 12:30 a.m.," Shmuel told ABC News. "We figured that it would be safe."

Both said they stayed awake while waiting overnight and appreciated the weather cooperating.

"It was really a beautiful night," Levi said.

A total of five members of the public made it into the courtroom this morning.