Parole in the United States has proven to be politically divisive. Beginning from the initiation of the war on drugs in the 1970s, politicians began to advertise their “tough on crime” stances, encouraging a tightening of penal policy and resulting in longer sentences for what were previously referred to as minor drug violations. During elections, politicians whose administrations parole any large number of prisoners (or, perhaps, one notorious criminal) are typically attacked by their opponents as being "soft on crime". According to the U.S. Department of Justice, at least sixteen states have removed the option of parole entirely, and four more have abolished parole for certain violent offenders. However, during the rise of mass incarceration in the 1970s, the states that continued to use parole and indeterminate sentencing contributed more to rising incarceration rates than those without parole boards. Said states implemented a dramatic decrease of parole releases, which inevitably resulted in longer sentences for more prisoners. From 1980 to 2009, indeterminate sentencing states made up nine of the ten states with the highest incarceration rate.