On December 21, 2018, President Trump signed into law The FIRST STEP Act as P.L. 115-391. This law provides much-needed reform to federal sentencing and corrections, with the ultimate goal of reducing recidivism. Here is a link to the text of the law, and to a brief synopsis provided by FreedomWorks (a public-interest advocacy organization in Washington, DC).
President Trump signs The FIRST STEP Act into law.