"I come from a state that raises corn and cotton and cockleburs and Democrats, and frothy eloquence neither convinces nor satisfies me. I am from Missouri. You have got to show me." 1899 speech by Congressman Willard Duncan Vandiver.
However, earlier than that, the phrase was originally a reference to Missouri laborers being brought to Colorado to quell a miner's strike and requiring frequent instruction.
First of all it is called the show me state and the state is... Missouri
"The Show Me State"
Missouri is the Show Me State
The Show Me state
Missouri Missouri joined the United States as the 24th state in 1821.
Missouri is called the show me state. There is no show you state.
Missouri
Missouri has the nickname "Show-Me State"
Missouri is known as the "Show-Me State"
He was from Missouri, the "Show Me" state.
Missouri
Missouri