Forty former top federal law enforcement officials want senators to hit the breaks on bipartisan legislation that would roll back mandatory minimum sentences for drug dealing and other crimes.

The group, which includes former New York mayor and U.S. Attorney Rudy Giuliani, former Attorney General John Ashcroft and drug control czar William Bennett, say sentencing laws enacted in the 1980s and 1990s led to the dramatic dip in crime rates that began 25 years ago, a claim disputed by many liberals and criminologists.

"Our system of justice is not broken," the former officials wrote in a Dec. 10 letter sent by the National Association of Assistant United States Attorneys to Senate leaders. "Mandatory minimums and proactive law enforcement measures have caused a dramatic reduction in crime over the past 25 years, an achievement we cannot afford to give back."

The officials call for leaving the current sentencing regime alone.

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