From the New Yorker:

There is now significant evidence that Trump has been trying to cover up something related to the F.B.I. investigation. We just don’t know what it is. In Watergate, Bernstein noted, “we knew there was a break-in and also that there was a massive campaign of political espionage and sabotage to undermine the political opposition.” But with Trump, he went on, it could be a range of offenses: “Is it specific acts of collusion? Is it his financial dealings with ethno-Russians and countries of the former Soviet empire or those of others around him? Is it about obstructing these investigations because they’ll reveal inappropriate contacts between the campaign and people acting in the interests of a hostile foreign power, perhaps including the President? We don’t know yet.”

The longer this goes on, the more it feels like Watergate.