Elon Musk, CEO of SpaceX and Tesla and owner of X, formerly known as Twitter, attends the Viva Technology conference dedicated to innovation and startups at the Porte de Versailles exhibition centre in Paris, France, June 16, 2023. REUTERS/Gonzalo Fuentes/File Photo

LONDON, Aug 21 (Reuters Breakingviews) - Elon Musk has no easy way out of his fight with the European Commission, which is investigating whether his social-media site X breached rules designed to limit illegal content and disinformation. The billionaire is facing determined adversaries in the relevant Commissioners Thierry Breton and Margrethe Vestager, who have a new legal tool. Musk may eventually conclude that pulling the plug makes sense.