Sam Schechner reports in The Wall Street Journal that French prosecutors have summoned Elon Musk to Paris to face preliminary criminal charges as part of their investigation into X. The summons comes weeks after Musk skipped a voluntary interview, and the standoff reflects "a growing divergence between the U.S. and Europe over how — and whether — tech platforms like X should police online speech." The probe started in 2025 over allegations of a biased algorithm and has since expanded to include charges of "violating the secrecy of correspondence, dissemination of child pornography and the creation of sexualized deepfake images by its Grok chatbot." French law enforcement raided X's Paris offices in February to gather evidence. Prosecutors said Thursday that the case is now an official criminal investigation. The U.S.…