[jandrese]

According to the cook political report[1]:

California 3 - D+5

Texas 35 - D+15

Ohio 12 - R+7

Ohio 7 - R+12

Connecticut 1 - D+12

Missouri 8 - R+24

Missouri 6 - R+16

Oregon 5 - EVEN

Ohio 4 - R+14

North Carolina 6 - R+9

Texas 15 - D+7

Illinois 18 - R+15

Alabama 1 - R+15

New York 7 - D+38

New York 8 - D+36

Illinois 11 - D+9

Arizona 6 - R+9

Florida 25 - R+4

Texas 12 - R+18

Ohio 10 - R+4

Michigan 13 - D+32

Tennessee 4 - R+20

California 43 - D+29

Illinois 4 - D+33

New Jersey 5 - R+3

New York 8 - D+36 (yes they used it twice)

California 8 - R+9

California 14 - D+27

Illinois 12 - R+5

Indiana 8 - R+15

Ohio 8 - R+17

What you are looking for is states where you see a lot of one party with +5-9 districts and then a handful of districts that are +20 or more for the other party.

https://cookpolitical.com/pvi-map-and-district-list