100 Senate Seats by population

[TJ in Oregon]

Ohio



1 (blue): 59.5% Obama, 39.0% McCain
2016 Rating: Safe D

2 (green):  52.1% McCain, 46.4% Obama
2016 Rating: Safe R

2 (purple):  50.0% McCain, 48.2% Obama
2016 Rating: Likely R

NEOH makes a really clean district within 2,500 of ideal population and is a natural Democratic sink. The main question becomes where to put Toledo, though it doesn't change the partisan dynamics much either way. Ohio is pretty awkward with 3 districts; 4 works much better.

[TJ in Oregon]

Pennsylvania



1 (blue): 69.9% Obama, 29.3% McCain
2016 Rating: Safe D

2 (green): 50.6% Obama, 48.4% McCain
2016 Rating: Tossup

3 (purple): 50.6%% Obama, 48.3% McCain
2016 Rating: Tossup

4 (red): 53.0% McCain, 45.7% Obama
2016 Rating: Safe R