

"The term was coined by President Woodrow Wilson in his 1916 campaign that pledged to keep America neutral in World War I." https://www.huffpost.com/entry/the-etymology-of-america-first_b_5889767de4b0628ad613de3f
He also thinks it means whatever he wants it to mean. He's Humpty Dumpty:
“When I use a word,’ Humpty Dumpty said in rather a scornful tone, ‘it means just what I choose it to mean — neither more nor less.’
’The question is,’ said Alice, ‘whether you can make words mean so many different things.’
’The question is,’ said Humpty Dumpty, ‘which is to be master — that’s all.”
Lewis Carroll, Through the Looking Glass
You've encouraged yet another war.
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