There's a small sci-fi novella I read once about a company that resurrected King Arthur in AI form, who through sheer charisma won the hearts and minds of the m

There's a small sci-fi novella I read once about a company that resurrected King Arthur in AI form, who through sheer charisma won the hearts and minds of the masses and went onto dominate English politics, spurring a (new) nationalist movement in England. The story ends with the company building on their success in the UK and shifting their focus onto Germany...