I couldn't find a thread for 2020 predictions, so I'll leave them here based on polls and what I think so far.
Republicans flip two seats: North Carolina and Montana. Montana goes Safe R and North Carolina Lean R.
In Montana, Republicans had higher turnout in the gubernatorial race on June 2. I think Cooper was unpopular by threatening capacity of the RNC Convention and may lose some bipartisan votes for that.
I also think Washington and Delaware will go to Democrats by 5-10%.
Delaware just doesn't have that moderate kick to make this happen, especially in a Presidential election year. New Castle roundly cancels out gains from Kent and Sussex.
Well, that is true but Clinton won it by 11, all it needs to do to become 5-10% is go down a point.