Depends on the state, Texas they are in solitary, Mississippi they are in the general population, others have death rows where the prisoners there mix.
Interesting, have just looked for sources. Death Row Mississippi is now really nice by comparison:
Even in a nation known for its draconian prison conditions and brutal lockdown units, the supermax portion of Mississippi’s state penitentiary stood out. Critics and residents described it as a “horrific” and “wretched” place of “hopelessness and despair.” Or, as Chris Joyner described it last...
solitarywatch.org
"None of this means that all is well in the Mississippi prison system–far from it. The state’s prisoners–including, no doubt, many of those moved out of Unit 32–still suffer from
inadequate health care, overcrowding, and a host of other problems. But it seems like a significant victory, especially when it comes to challenging the excessive, arbitrary, and inhumane use of solitary confinement. In a
press release issued by the ACLU, Margaret Winter said, “This facility was truly a dangerous and degrading environment for prisoners and staff alike. The fact that this facility is now being closed is a great end to the long road that we have been on.”
Further reading from old friend wiki...
"When the prosecution seeks the death penalty, the sentence is decided by the
jury and must be unanimous. If the jury recommends death, it is required to record what it considers the "aggravating circumstances" about the crime that led it to that decision.
In case of a
hung jury during the penalty phase of the trial, the judge issues a life sentence, even if only one juror opposed death (there is no retrial).
The power of clemency belongs to the
Governor of Mississippi."
Thanks to Bakunin ( who sadly is no longer around} I found this book by Donald Cabana who ran a death row prison and was very anti death penalty.
xii, 200 pages : 24 cm
archive.org