I had the relationship finder up and decided to try a couple of the presidents to see what happened. Turned out I'm related to James Garfield. So then I had to check them all. I'd already had George W Bush as a cousin but now I found his father George H W Bush and also Herbert Hoover. I'm pretty sure I'd checked before and hadn't found anyone but George W. All three of the new ones where through some Scotts. I don't know if I've added a new ancestor or someone else has lengthened a Scott line. Anyway it's a fun thing to do if you haven't tried it yet.
And now I'm encouraged to work on completing my ancestors I haven't added yet. And to work on the lines of James, George(s) and Herbert to make the connections confident.