In President Trump’s oft-changing world order, Roger J. Stone Jr., the onetime political consultant and full-time provocateur, has been one of the few constants — a loyalist and self-proclaimed “dirty trickster” who nurtured the dream of a presidential run by the developer-turned-television-star for 30 years.
But two months into the Trump presidency, Mr. Stone, known for his pinstripe suits, the Nixon tattoo spanning his shoulder blades, and decades of outlandish statements, is under investigation for what would be his dirtiest trick — colluding with the Russians to defeat Hillary Clinton and put his friend in the White House.
At a hearing of the House Intelligence Committee on Monday, Democrats pressed James B. Comey, director of the F.B.I., for information on Mr. Stone. Asked by Representative Adam B. Schiff of California, a Democrat, if he was familiar with Mr. Stone, Mr. Comey replied tersely, “Generally, yes,” before saying he could not discuss any specific person.