Commentary The United States is confronting a pair of ruthless dictatorships in two potential collisions that could change history and leave Americans at enormous risk. The news media focus is currently on Vladimir Putin and his threat to occupy part or all of Ukraine. Everyone recognizes that President Joe Biden made a dangerous mistake in his two-hour press conference when he said “a minor incursion” by Russia into Ukraine might be acceptable. His administration was trying to reverse that comment as soon as the press conference ended and spent the next two days trying to reassure everyone—including our allies—that Biden did not mean what he clearly said. Of course, the Biden threat that there would be “severe sanctions” if Russia invaded Ukraine probably has no effect on Putin. First, when he seized all of Crimea the Obama-Biden administration threatened severe sanctions and nothing seemed to hurt Russia much. Second, at …