For once, Roger Stone was at a loss for words. The longtime confidant of President Trump had given nonstop interviews and news conferences since Friday morning, when the FBI pounded on his door, then charged him with seven criminal counts related to alleged lies during the probe of Russia’s election interference. But in Washington on Monday, as his lawyer entered a not-guilty plea on his behalf, the flamboyant politico uttered just eight words during his 13-minute arraignment (two “yes, your honors” and an “I do”), and then just four more as a scrum of journalists followed him to the exits: “No comments.