FILE - In this June 9, 2019, file photo, Democratic presidential candidate Cory Booker speaks during the Iowa Democratic Party's Hall of Fame Celebration in Cedar Rapids, Iowa. Booker says, if elected, he plans to pursue clemency for the thousands of prisoners incarcerated for nonviolent drug crimes. (AP Photo/Charlie Neibergall, File)

FILE - In this June 9, 2019, file photo, Democratic presidential candidate Cory Booker speaks during the Iowa Democratic Party's Hall of Fame Celebration in Cedar Rapids, Iowa. Booker says, if elected, he plans to pursue clemency for the thousands of prisoners incarcerated for nonviolent drug crimes. (AP Photo/Charlie Neibergall, File)

WASHINGTON (AP) — Democratic presidential candidate Cory Booker says if he’s elected, he plans to use the powers of the office to pursue clemency for what his campaign estimates is more than 17,000 prisoners incarcerated for nonviolent drug crimes.

The New Jersey senator’s clemency plan would affect offenders serving time for three categories of crimes: those related to marijuana; those whose sentences would have been reduced if the criminal justice overhaul signed by President Donald Trump last year were applied retroactively; and those affected by the disparity between sentences for possession of crack versus powder cocaine.