Sen. Lindsey Graham Lindsey Olin GrahamSenate GOP aims to confirm Trump court pick by Oct. 29: report The Hill's Campaign Report: GOP set to ask SCOTUS to limit mail-in voting Senate GOP sees early Supreme Court vote as political booster shot MORE (R-S.C.) says that acting Attorney General Matthew Whitaker has "concerns" about a criminal justice bill authored by senators with the help of President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE's son-in-law, Jared Kushner Jared Corey KushnerAbraham Accords: New hope for peace in Middle East Tenants in Kushner building file lawsuit alleging dangerous living conditions Trump hosts Israel, UAE, Bahrain for historic signing MORE, but doesn't want to stop the bill from passing.

Graham told The Washington Post that Whitaker's concerns centered around the aspects of the bill dealing with enforcement of drug felonies, for which the bill would reduce mandatory minimum sentences in some cases.

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“He said he doesn’t want to kill it,” Graham said Thursday, according to the Post. “He just wanted to express his concerns.”

Graham also said Whitaker had expressed his concerns to Trump, who announced his own support for the plan on Wednesday.

Whitaker's views on the bill are important as his predecessor, Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsGOP set to release controversial Biden report Trump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status MORE, was seen as a major obstacle to proponents of criminal justice reform on Capitol Hill.

The bill, among other measures, would reduce the final "three strikes" penalty from life in prison to 25 years behind bars.

“These members have reached a bipartisan agreement … on prison reform legislation. Today I’m thrilled to announce my support,” Trump said on Wednesday. “I urge lawmakers in both House and Senate to work hard and to act quickly and send a final bill to my desk, and I look very much forward to signing it.”

Trump on Wednesday touted the bill's support from the Fraternal Order of Police and other law enforcement groups during a ceremony with GOP lawmakers and Kushner at the White House.

“Throughout this process my administration has worked closely with law enforcement. Their backing has ensured that this legislation remains tough on crime. It’s got to remain very tough on crime and supports the tremendous work of our police,” the president said at the event.