Walker hopes this new offer holds the key to his cell door.
His lawyers are optimistic, too, noting in a July letter to the Justice Department that he meets all six criteria for possible release, including serving a sentence that would have been substantially lower if imposed today. They also have support from an unlikely corner: Walker's trial judge, who has urged the president to commute the sentence to 20 years.
Scott Walker's story reflects a debate over decades of get-tough laws that have jammed America's prisons with drug offenders. The trickiest question: How do you make sure the punishment fits the crime?
Walker says he knows he should have paid a price for what he did.
But, "Is there mercy for people who have made mistakes?" he asks, sitting in federal prison here in southern Illinois. "I believe everyone deserves a second chance."
Feeling invincible • Walker attributes his drug dealing to immaturity and recklessness.
"You feel like you're invincible, that you're never going to grow old," says Walker, who looks a decade younger than 42.
Growing up in southern Illinois, Walker started using marijuana around age 14, then graduated to meth. He played guitar in a band, and drugs, he says, were an accessory to his rock-'n'-roll lifestyle.
"Scott was a very strong-willed young man," says Keith Shelton, his stepfather. "He felt like most kids do. ... You're made out of steel. You're never going to get caught."
By his late teens, when his family moved to Arizona, Walker began trafficking marijuana, meth and LSD back to Illinois, where he funneled his profits into his $350-to-$400-a-week meth habit. He became part of a loose-knit ring, sometimes selling drugs, sometimes enlisting others.
Nabbed as part of a drug conspiracy in 1996, Walker saw his troubles quickly worsen.
He didn't cooperate with authorities, he says, because he didn't want his friends to suffer. Unaware he faced life, he went to trial, despite overwhelming evidence against him. Then his lawyer withdrew because of a conflict of interest. When a public defender took over, the window for requesting a plea had closed.
Walker, later described by the judge as a middleman in the ring, was the only one to receive life. Sentencing guidelines added years for aggravating factors, including his organizing role and the quantity of drugs.
Stiff sentence • By the time Walker was sentenced, the nation was already reassessing two decades of stiff, punitive drug laws. In the 1970s and 1980s, the "war on drugs" had escalated. State and federal lawmakers, fed up with rising crime rates, increasing street violence and growing concerns about drug abuse, responded with new fixed, severe sentences.
In 1986, with the crack epidemic ravaging big cities, Congress passed the federal Anti-Drug Abuse Act that imposed mandatory minimums for nearly all drugs.
"The only thing was 'How tough can we be?'" says Eric Sterling, who helped draft the bill as counsel for the House Judiciary Committee. "The general sentiment was the public wants it and this is what we should do." Policymakers thought "if we punish, we can smash the supply," he adds. "There wasn't any real understanding this was a flawed premise."
But starting in the '90s, judges began speaking out about inflexible sentences.
Between 2009 and 2013, 40 states many facing tight budgets and overcrowded prisons took some steps to ease their drug laws, according to a Pew Research Center analysis.
The Justice Department's clemency review focusing on non-violent offenders is part of a larger plan to ease the bloated federal prison system, where nearly half the inmates are serving time for drugs.
Judge advocate • Included in Walker's petition is a 2011 letter from Judge J. Phil Gilbert, an appointee of President George H. W. Bush., who has called the life term he had to impose in 1999 "excessive and disproportionate." He also praised Walker as "an example of the human spirit at its strongest." Walker's lawyers have urged his sentence be commuted to 20 years.
Sharon Cohen, a Chicago-based national writer, can be reached at scohen(at)ap.org.