There are a lot of dots here, and the challenge is how to connect them. Be careful: Democrats should avoid descending into the kind of conspiratorial mind-set that led some Republicans to assume Hillary Clinton was a criminal about to be indicted or to conjure sex slaves belonging to her in a Washington pizza restaurant. Coincidences happen, and I think there has been too much focus on Attorney General Jeff Sessions, not enough on Paul Manafort, the former Trump campaign manager. Here are 10 crucial dots: