President Barack Obama announced new measures to smooth the integration of former criminals into society but his visit to New Jersey on Monday irked the state's governor, a struggling Republican presidential candidate.

Obama, a Democrat who has made criminal justice reform a priority of his final years in office, praised organizations in Newark for their efforts to help those who have served prison terms to reintegrate into civilian life.

"We've got to make sure Americans who have paid their debt to society can earn their second chance," Obama said in a speech at Rutgers University in Newark, a city of about 280,000 that has grappled for decades with poverty and high rates of violent crime.