About 20 Lombardy companies in auto parts, industrial paints, and aerospace are exploring investments in Mexico City, Querétaro, and Guanajuato, despite concerns over Donald Trump's tariffs, according to Lorenzo Vianello, president of the Italian Chamber of Commerce in Mexico (CCIM). Italian firms have invested over $7.73 billion in Mexico in the past 18 years, including $3.3 billion in new…