Sharing here a resource that may be useful to track AI legislation at the state level in the US.
[edit: the page seems to have been put behind a registration wall. The version I visited is on the Internet Archive.]
I checked California out of curiosity and discovered that they have defined AI following the OECD definition of Artificial Intelligence:
(1) “Artificial intelligence” means an engineered or machine-based system that varies in its level of autonomy and that can, for explicit or implicit objectives, infer from the input it receives how to generate outputs that can influence physical or virtual environments.
HTH