No, they can't. Judges are now limited to sentencing based on facts found by the jury.
Take a look at: High Court Overturns Sentencing Guidelines
The high court found that the mandatory sentencing guidelines system violated the Sixth Amendment right to a jury trial because it required judges to base part of their sentencing decisions on additional facts, such as previous criminal history or using a weapon, which a jury did not specifically find to be true.
So, if a jury convicts someone of drug-dealing and finds two aggravating circumstances, that criminal will still get the statutory minimum for the crime plus any "bump-up" due to the two aggravating circumstances.
This decision has not created a free-for-all where judges can give a one-year sentence for murder.
Still leaves possibilty of many liberal judges going easier on criminals.