Customary of controversial messages, billionaire Elon Musk launched a double salvo on Thursday, accusing an American regulator of seeking to muzzle his freedom of expression and comparing Justin Trudeau to Hitler. • Read also: Controversy in the United States after the freezing of the GoFundMe of the protesters A lawyer for electric car maker Tesla said in a letter to a judge on Thursday that the Stock Exchange Constable (SEC) was waging a “campaign of harassment” against Mr. Musk, as part of an agreement tied between the two parties. The SEC had imposed several sanctions after a tweet in which...