I enjoyed the show “House of Cards” but always felt that it went a bit too far, that its plot wasn’t plausible. After seven weeks of President Trump, I owe “House of Cards” an apology. Nothing seems impossible any more.

That includes the most towering suspicion of all: that Trump’s team colluded in some way with Russia to interfere with the U.S. election. This is the central issue that we must remain focused on.

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:

1. President Trump and his aides have repeatedly and falsely denied ties to Russia. USA Today counted at least 20 denials. In fact, we now know that there were contacts by at least a half-dozen people in the Trump circle with senior Russian officials.