WASHINGTON—The assassination of conservative commentator Charlie Kirk has touched off wider efforts to investigate individuals and organizations on the far left.
As Trump administration officials vow to act, some lawmakers have called for a new select committee to examine the financial backers of left-wing activism. The Federal Bureau of Investigation, meanwhile, has broadened the scope of its inquiry into the killing, raising basic questions about who knew or did what in conjunction with the political violence that has gripped the United States.
