Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
Here's what Hertz has to say about liability insurance in various states. I assume -- but do not know -- that Hertz only provides what it is required by law to provide, and that Thrifty's coverage would mirror Hertz's.
https://www.hertz.com/rentacar/reser...ES&EOAG=MSPT11
That said, I would never rely on the paltry state-minimum coverage even in those few states where the coverage is primary. If you rent cars with any frequency and do not own a car, look into the cost of a non-owned-auto liability policy. (Mine is issued by The Travelers.)