Trump trial updates: Appeals court denies defense's bid for judge's recusal

The prosecution team has entered the courtroom for today's proceedings.

Former President Trump has arrived at the courthouse.

Former President Trump is not expected to take the stand in his criminal hush money trial, sources familiar with the matter tell ABC News.

It's possible that Trump could make a last-minute decision to testify, so sources caution that nothing is final until the defense rests its case.

Trump's lawyers have indicated publicly that Robert Costello, Michael Cohen's one-time legal adviser, is expected to be their last witness before they rest their case today.

Former President Donald Trump is expected to be joined by his son Don Jr. in court today.

It would mark the first time Don Jr. has attended the trial.

As has been the case over the last several days in court, a number of Republican lawmakers are expected to attend today's proceedings in support of Trump.

A day after Judge Judge Juan Merchan threatened to remove him from the witness stand, former federal prosecutor Robert Costello will resume his testimony this morning as the second witness in Donald Trump's defense case.

Costello is expected to be the final defense witness before Trump's lawyers rest their case today.

Yesterday, Costello told jurors about his meetings and phone calls with Michael Cohen in 2018 after FBI agents raided his office and hotel room. Costello advised Cohen and helped pass messages to the Trump, according to Cohen, but never formally represented him as his lawyer.

"Michael Cohen said, numerous times, that President Trump knew nothing about those payments, that he did this on his own, and he repeated that numerous times," Costello testified about the hush money payment to adult film actress Stormy Daniels that sits at the center of the case.

Cohen told the jury that he lied to Costello about Trump's involvement in the scheme to use hush-money payments to hide information from voters.

Costello's reactions to Judge Merchan after taking the stand yesterday afternoon -- responding "jeez" to a sustained objection, rolling his eyes at the judge, and appearing to staring him down -- prompted Merchan to clear the courtroom before threatening to remove Costello from the witness stand.

While defense lawyers suggested yesterday that they would not call Trump to the witness stand, they will likely have to confirm a final decision about the defendant's testimony -- or lack thereof -- before they rest their case.

Judge Merchan has scheduled a charge conference at 2:15 p.m. ET to hear arguments over how to instruct the jury about the law in the case.