As of election day, for 2020, the following are states that have passed initiatives concerning cannabis for either medicinal and/or recreational use. Those states were mentioned in a Yahoo article, detailing the following:
“Later on Tuesday night and into Wednesday morning, Arizona and Montana voted to legalized recreational cannabis, Mississippi voted to legalize medicinal cannabis, and South Dakota became the first state to legalize both medicinal and recreational cannabis during the same election. In other words, every cannabis measure passed.” (Source: https://www.yahoo.com/entertainment/everything-know-2020-cannabis-ballot-203415558.html)
Source: https://www.yahoo.com/entertainment/everything-know-2020-cannabis-ballot-203415558.html