Blue gerrymander -
https://districtr.org/plan/128422EDIT: SAME STORY: Had another map I wanted to save/share on here, but I didn't want to bump up the whole thread just for that, so I'll just post it here.
https://districtr.org/plan/145597. Initially my only real goal was to create a few Clinton/Trump districts (to be precise - two Clinton-Trump districts and a Trump-Biden district), but what I ended up was a bunch of very competitive districts that flipped between blue and red. Also mentioning % margins here since Districtr might remove them (all figures are from two-way vote share between Clinton/Biden and Trump). Skipped the totally and entirely irrelevant/uncompetitive districts.
OH01: Cincinatti - went from giving Trump 50.08% of vote in 2016 to giving Biden 51.76% in 2020.
OH02: Cincinatti western suburbs - gave Trump 59.2% in 2016; 55.8% in 2020.
OH03: Dayton area - gave Trump 56.59% in 2016; and 54.75% in 2020.
OH04: Parts of Columbus area, but also rural swaths of territory in western OH north of Dayton - 54.4% for Trump in 2016; 53.94% for him in 2020
OH05: Columbus and northern suburbs - 55.66% for Clinton; 58.71% for Biden
OH06: Safe R; rural OH
OH07: Columbus and southern suburbs and exurbs - very narrowly for Trump twice - 50.65% in 2016; 50.25% in 2020
OH08: Toledo and other areas in NW OH - Clinton/Trump district - 50.65% for her in 2016; 50.25% for him in 2020
OH09: Safe R; awkwardly-shaped seat in northern OH
OH10: Safe R; along the Ohio River and similar to Bill Johnson's very R-trending 6th district (which IRL had the hardest swing to the right from 2012 to 2016, swinging 30 points right)
OH11: Youngstown+Akron+Canton - initially meant to be a Clinton/Trump seat - 50.93% for Clinton; 50.44% for Biden
OH12: Eastern Cuyahoga plus Northeast OH - 53.84% for Clinton; 52.13% for Biden
OH13: Cleveland area - 69.09% for Clinton; 67.05% for Biden
OH14: Western Cuyahoga and areas to the south of that - 50.91% for Trump in 2016; razor-thin 50.01% for Trump in 2020
OH15: Safe R
EDIT: 9-6 Democratic 'mander:
https://districtr.org/plan/149483. Same 9 seats for Clinton and Biden - but all 15 districts for Portman in the 2016 senate election.