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That sounds good. Then everyone, whether they want to use AI or play the game normally, will be satisfied. Go for it!

I don't think you should add an AI model at all. After playing the game yesterday I found it very enjoyable on its own and I feel like adding an AI model would introduce unnecessary variables and glitches into the game. My suggestion would be to look into maybe expanding the game to include your tenure as president after being elected, responding to various crises and actually governing the country, if that's something you would be interested in. Great game overall so far!