The easiest call is that Trump will lose the national popular vote, again. Will leave it to others to project whether it will be by more or less than 2016 as I haven't focused on that aspect.
Ticket splitting in 2020? In 2016 I suggested that watching the Senate races would be more constructive than monitoring the Presidential polls and that ticket splitting wouldn't feature. Thus, I put FL and NC into the Trump column. NH was too close to call. The WI Senate polls totally tripped me up. And then I made the boneheaded (split-ticket) projection in PA – HRC and Toomey.