Under the provisions of the Missouri Compromise, Maine was the state that entered the Union with Missouri.
Michigan was a free state, and stayed in the Union.
Associated free state
Under the Missouri Compromise of 1820 Missouri was admitted as a slave state and Maine as a free state.
Puerto Rico is not the state of US ,it is a self-governing commonwealth associated with the United States.
Missouri joined as a slave state and Maine joined as a free state.
Hawaii.
The Missouri Compromise of 1820 allowed a slave state into the union when alternated with a free state. The compromise allowed Missouri to enter the US as a slave state and part of Massachusetts was divided to allow the entrance of Maine into the US as a free state.
us t-bills, if you're worried about inflation TIPS, state/municipal bonds, however these are associated with slightly higher default risks than t-bills.
There is one US State that begins with the letter P: Pennsylvania. And, while not a state, Puerto Rico is associated with the United States.
That it would be a Free State.
The Old Line State, The Free State, America in Minature and Little America are all associated with Maryland but it has no Official Nickname.