The European Union is set to slap Mark Zuckerberg’s Meta with a fine that could stretch to $1 billion or more for allegedly violating its strict antitrust rules, The Post has learned – setting up a possible showdown with President Trump, who has compared the EU’s penalties to “overseas extortion.” The European Commission, the EU’s antitrust watchdog, is expected to conclude that Meta is not in compliance with the Digital Markets Act, sources close to the situation told The Post on Monday. The la...