House Majority Whip James Clyburn (D-S.C.) urged lawmakers Tuesday to take the next steps on criminal justice reform.

Clyburn, the third-ranking House Democrat, hailed the First Step Act, a bipartisan measure signed into law by President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE last year, and expressed hope Congress could build on that achievement.

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“The dam has broken so I think we can move forward,” Clyburn said at Leadership in Action: Criminal Justice Reform, an event sponsored by the American University School of Public Affairs and the Kennedy Political Union and hosted by The Hill at the Newseum.

Clyburn said that, like the civil rights movement, criminal justice reform would be a multistep process.

“When you talk about these things, it may sound like we have a big, ominous bill, but it happened over a period of time,” Clyburn said. “I think in the end, incrementally, we’re going to have a pretty good comprehensive criminal justice reform bill.”

"The Leadership in Action: Criminal Justice Reform. From the FIRST STEP Act to what additional efforts need to be taken to reduce mass incarceration on a state and local level ..." @TheHillEvents #TheHillCJR #CJReform pic.twitter.com/L4fAELF02y — JPO at AU (@AU_JPO) February 26, 2019

The First Step Act includes measures to reduce mandatory minimum sentences and promote rehabilitative programs for those in federal prisons.

Clyburn also addressed his next priorities. In addition to addressing mental health issues for the incarcerated, he wants to tackle sentencing disparities for crack cocaine, an issue which he said "really bothers" him.

Clyburn said officials backed tougher sentencing "because crack cocaine was a scourge in African-American communities and they wanted it out."

"And so they supported this, only to later find out how it could be misused,” he added.

The South Carolina lawmaker also wants to tackle the issue of “stacking," when mandatory minimum sentences are combined to give individuals longer sentences.

Rep. Doug Collins Douglas (Doug) Allen CollinsTrump, Biden tied in Georgia: poll Loeffler paints herself as 'more conservative than Attila the Hun' in new campaign ad Vulnerable GOP incumbents embrace filling Supreme Court seat this year MORE (R-Ga.) also spoke at the event on the obstacles faced by lawmakers in passing criminal justice reform.

“We still have folks in Congress who still believe we ought to incarcerate as if we’re in the 50s,” Collins said, “and that’s just a backwards mentality that we’ve got to overcome.”

Collins also said overcoming skepticism from law enforcement officials was a challenge.

“Anytime that they saw what they viewed as their work being compromised,” Collins said, “there’s going to be some reaction. So yeah, there was some pushback.”

The Georgia lawmaker added that at the end of the day it would take "money and morals" to further reform.

Del. Stacey Plaskett Stacey PlaskettDOJ rejects statehood for Puerto Rico — so do Puerto Ricans Bottom line Biden rolls out over a dozen congressional endorsements after latest primary wins MORE (D-Virgin Islands) noted that the First Step Act paid for itself, helping bring critical support.

"I think it was a coalition of individuals really pulling on those Republicans who saw this as a moral imperative but also saw it as a financial imperative,” Plaskett said.

Sen. Ben Cardin Benjamin (Ben) Louis CardinCongress must finish work on popular conservation bill before time runs out PPP application window closes after coronavirus talks deadlock Congress eyes tighter restrictions on next round of small business help MORE (D-Md.) spoke about another proposal, restoring voting rights to former inmates. Cardin said he is hopeful his colleagues will support his Democracy Restoration Act.

“We have these different disagreements on how comprehensive the bill should be,” Cardin said. “But that’s how the legislative process works."

"For First Step, it went well so I hope we can find the same thing,” he added.