Donald Trump's former personal attorney and fixer Michael Cohen said the ex-president is likely "seething" over the indictment because he's "never been held accountable."

"The fact that he is being held accountable, something that he has no desire to ever be. He's never been held accountable," Cohen told ABC News' George Stephanopoulos in an interview Friday on "Good Morning America."

"This is a man who held up the Bible and said he's never apologized to God because he's never done anything wrong," he added. "He doesn't understand accountability. And right now, [Manhattan District Attorney] Alvin Bragg has finally put that into his lap."

Cohen, who is now estranged from Trump and is a key prosecution witness, said he decided years ago that his "loyalty can no longer be to a man who doesn't deserve it."

Cohen was sentenced to three years in prison in December 2018, after pleading guilty to violating federal campaign finance law in connection with hush-money payments and lying to Congress, among other crimes.

During Friday's interview on "GMA," Cohen said he followed Trump's "message" for more than a decade and "that is what got me in trouble."

When asked if he feels ready to be cross-examined, Cohen replied: "Absolutely."

"The documents will speak for themselves," he added, referring to the sealed indictment.

"So, not just your testimony?" Stephanopoulos responded.

"No," Cohen said. "And it's also corroborating testimony, but it's documents."

Donald Trump's attorney, Joe Tacopina, said the former president's initial reaction to his indictment was "shock," despite predicting his own arrest "based on rumours and leaks."

"It was shock because it's actually coming to fruition," Tacopina told ABC News' George Stephanopoulos in an interview Friday on “Good Morning America.”

"At the end of the day, we were really hoping and he was hoping that the rule of law would've prevailed," he added. "In my opinion -- and I don't say this with pride or pleasure -- in my 32 years as a lawyer, both as a prosecutor and a defense attorney, I feel like the rule of law died yesterday in this country."

When asked what to expect next week, Tacopina said "it's a great question."

"This is unprecedented in this country's history. I don't know what to expect other than an arraignment," he said. "I understand they're going to be closing off blocks around the courthouse, shutting down the courthouse. You know, we'll go in there and we'll proceed to see a judge at some point, plead not guilty, start talking about filing motions, which we will do immediately and very aggressively regarding the legal viability of this case."

Tacopina noted that "there is really no precedent for this case, [because] this was done with personal money."

"Statutorily, the law says this: If the payment was made with personal funds and it would've been made irrespective of the candidate's campaign, it's outside of campaign finance and, clearly, that's what you have here,” he said.

When asked whether there will be handcuffs, a mugshot or a perp walk, Tacopina responded: "I'm sure they will try to get every ounce of publicity they can out of this thing."

"The president will not be put in handcuffs," he added. "As far as a mugshot's concerned, perp walk, I mean, you know, as I said, I'm sure they'll try to make sure they get some joy out of this by parading him."

"But, you know, I think this is a different situation," he continued. "It is a lot of groups involved here and I don't think they're going to allow this to become a circus, as much as humanly possible."

When asked how concerned he is about this case and the other potential cases Trump could be facing, Tacopina said: "We have to deal with it one at a time."

"Right now, I'm dealing with this case exclusively and another civil matter for the president, but not the Fulton County case and not the special prosecutor's case at this point," he added. "And really, I'm not even thinking about those cases at all. I'm focused -- laser focused -- on this case and I'll keep all my attention here until this is resolved."

Former President Donald Trump has been making calls to Congressional allies on Capitol Hill Thursday night, urging them to go on the offensive and defend him following the news of the indictment by a Manhattan grand jury, sources familiar with the matter tell ABC News.

Trump has been asking members who support him to firm up their support and rally behind him, the sources said.

-ABC News' Rachel Scott, Will Steakin and Katherine Faulders

Some of Trump's confirmed or prospective rivals for the 2024 Republican presidential nomination were among those who spoke out Thursday night in the wake of the news of the former president's indictment.

In an interview with CNN on Thursday night, former Vice President Mike Pence called it an "outrage," arguing that the case against Trump is "tenuous" and will "only further serve to divide our country."

Florida Gov. Ron DeSantis, whom sources have told ABC News is expected to launch a presidential campaign in the coming months, tweeted that the indictment was "un-American" and "a weaponization of the legal system," adding that Florida would "not assist in an extradition request."

Read more here.

-ABC News' Alexandra Hutzler and Mariam Khan

Manhattan District Attorney Alvin Bragg on Friday again resisted the House GOP investigation of his office’s prosecution of Trump.

Bragg’s legal counsel called the inquiry “illegitimate incursion” into a legitimate investigation.

The House Republicans -- Reps. Jim Jordan, James Comer and Bryan Steil -- have said they want to find evidence of federal funds used to investigate Trump. But Bragg’s office said they were merely doing Trump’s bidding.

“Finally, as you are no doubt aware, former President Trump has directed harsh invective against District Attorney Bragg and threatened on social media that his arrest or indictment in New York may unleash 'death & destruction.' As Committee Chairmen, you could use the stature of your office to denounce these attacks and urge respect for the fairness of our justice system and for the work of the impartial grand jury," counsel Leslie Dubeck wrote in a letter to the lawmakers.

"Instead, you and many of your colleagues have chosen to collaborate with Mr. Trump’s efforts to vilify and denigrate the integrity of elected state prosecutors and trial judges and made unfounded allegations that the Office’s investigation, conducted via an independent grand jury of average citizens serving New York State, is politically motivated.”