Here's what we know about the Russia investigation

The first hearing by the House Oversight Committee investigating Russia's interference with the 2016 elections lasted about six hours on Monday. After all that time talking, even Committee Chairman Devin Nunes, R-Calif., had to admit he hadn't learned much by the conclusion.

For all the fanfare given to Comey's appearance, at least one more public hearing is scheduled, and committee members have said more open hearings beyond that are possible as well. The ranking Democrat on the committee, Adam Schiff, D-Calif., is urging Nunes to compel testimony by subpoena, if necessary, further down the road.

Here's where some major issues and questions stand at present.

1 – President Trump was almost certainly not "wiretapped," as he claimed, but questions remain about whether he or aides might have been caught up in a broader surveillance operation.

As expected, Comey quickly knocked down the claim that Barack Obama's administration ordered a wiretap, saying that the FBI hadn't authorized or conducted such an activity.