One by one, the four officers who testified Tuesday -- DC Metropolitan Police Officers Daniel Hodges and Michael Fanone, and Capitol Police Officer Harry Dunn and Sgt. Aquilino Gonell -- recounted their gut-wrenching stories about how they were attacked and their lives were threatened on January 6.

Hughes described how he was forced to scream out in agony as he was pressed between the rioters and a metal doorframe. Fanone described how he was dragged into the crowd, beaten and electrocuted repeatedly with his Taser.

This was no tourist visit

"The indifference shown to my colleagues is disgraceful!" Fanone continued, raising his voice and slamming his fist on the table in one of the most powerful moments of the hearing.

Wyoming Rep. Liz Cheney, one of the two Republicans appointed by House Speaker Nancy Pelosi to the committee, asked Gonell specifically about Trump's comments that the crowd was loving.

"It's upsetting. It's a pathetic excuse for his behavior for something that he himself helped to create this monstrosity," Gonell said. "I'm still recovering from those hugs and kisses that day, that he claimed that so many rioters, terrorists, were assaulting us that day."

The select committee is going after Trump

“We must also know what happened every minute of that day in the White House – every phone call, every conversation, every meeting leading up to, during, and after the attack," she said. "If those responsible are not held accountable, and if Congress does not act responsibly, this will remain a cancer on our constitutional republic, undermining the peaceful transfer of power at the heart of our democratic system."

The Justice Department made it easier for former officials to testify, formally declining to assert executive privilege for the testimony of at least some witnesses related to the January 6 attack, according to a person briefed on the matter.

It still remains to be seen whether Trump, his former aides or his allies in Congress will actually testify – his White House has defied congressional subpoenas before – but the select committee is already signaling it's going to try.

Trump allies are on the outside looking in

House Democrats have held numerous high-profile hearings over the past several years aimed at the former President, from the testimony of former special counsel Robert Mueller to the impeachment proceedings over Trump's efforts to pressure Ukraine to investigate Joe Biden.

This was the first time none of Trump's allies could offer up a defense of the former president.

The seven Democrats and two Republicans on the select committee are all of the same mindset about the importance of getting to the bottom of what happened on January 6 and investigating Trump's role in the insurrection.

House Minority Leader Kevin McCarthy pulled the five Republicans he'd appointed to the select committee after Pelosi rejected two of his selections, and he's charged that the move shows Pelosi's select committee is politically motivated. McCarthy and the Republicans held a press conference to attack Pelosi ahead of the hearing Tuesday morning.

But the two Republicans who are on the committee as Pelosi appointees sought to rebut McCarthy's claims at Tuesday's hearing. Cheney was given a de facto speaking slot after Thompson to give an opening statement about the importance of the committee to get to the truth of what happened on January 6.

Rep. Adam Kinzinger, an Illinois Republican added to the panel after McCarthy withdrew his picks, choked up as he spoke to the officers testifying, explaining that he was serving on the committee "not in spite of my membership in the Republican Party but because of it."

"We still don't know exactly what happened. Why? Because many in my party have treated this as just another partisan fight," Kinzinger said. "It's toxic, and it's a disservice to the officers and their families, to the staff and employees on the Capitol Complex, and to the American people who deserve the truth."

The impact of January 6 goes well beyond politics

The creation the select committee to investigate January 6 has been swept up in a political fight for months now over how the January 6 insurrection should be investigated. The committee's work will undoubtedly delve into the political realm as it examines the role of Trump and the reasons the pro-Trump supporters descended on the Capitol, attacked officers and tried to stop the certification of Biden's November election victory.

But Tuesday's testimony underscored the lasting of impact the attack for those who experienced it up close on January 6. It's been particularly acute for Capitol Police officers, who have been hampered by low morale and shrinking ranks in the months following the attack.

The officers' testifying on Tuesday became emotional at multiple points as they recounted their stories and expressed raw frustration about how lawmakers they protect at the Capitol have tried to downplay or ignore what happened.

"It's indescribable. You're defending the indefensible," Gonell said of those lawmakers defending the insurrectionists. "It demoralizes not just the rank-and-file but the future recruits. What do you think people considering becoming law enforcement officers think when they see elected leaders downplaying this. Why would I risk my life for them, when they don't even care?"

In his testimony, Dunn acknowledged the mental toll the January 6 attack had on many officers, saying he's sought counseling and making a plea to his colleagues to be unafraid do the same.

"More than six months later, January 6 still isn't over for me," Dunn said. "I know so many other officers continue to hurt, both physically and emotionally. … What we went through that day was traumatic, and if you're hurting, please take advantage of the counseling services available to us."

Jeremy Herb, CNNUpdated 6:33 PM EDT, Tue July 27, 2021