DETROIT — As artificial intelligence expands, it threatens to exacerbate a growing trend for America's largest automakers: the elimination of white-collar workers. The "Detroit Three" automakers have together cut more than 20,000 U.S. salaried jobs, or 19% of their combined workforces, from recent employment peaks this decade, according to public filings and employment data from the companies. Reasons for the job declines vary by automaker, but in general are tied to evolving technological