Redistricting that theoretically benefits Republicans:
Georgia - +1R
Indiana - shift 1 D to 1 R
Massachusetts - -1D
Michigan - -1D
Missouri - -1D
New Jersey - -1D
North Carolina - shift 3 D to 3 R
Pennsylvania - -1D
South Carolina - +1R
Utah - shift 1D to 2R
Redistricting that theoretically benefits Democrats:
Arizona - shift 1R & 1D to 3T
California - shift 4 R to 4 D
Colorado - 2 tossup districts with R incumbents.
Illinois - shift 5 R to 4 D
Louisiana - -1 R
Maryland - shift 1 R to 1 D
Nevada - +1D
Washington - +1D
Redistricting that doesn't necessarily benefit either party.
Iowa - combine 1 D and 1 R into 1 Tossup
Ohio - -1R and -1D
Incumbent Protection Plans
Alabama
Arkansas
Hawaii
Idaho
Kentucky
Maine
Mississippi
Nebraska
New Mexico
Oklahoma
Oregon
Tennessee
Virginia
West Virginia
Wisconsin
Singer Member States
Alaska
Delaware
Montana
North Dakota
South Dakota
Vermont
Wyoming
Redistricting where outcome is too soon to tell:
Connecticut
Florida
Kansas
Minnesota
New Hampshire
New York
Rhode Island
Texas - + 3 D, + 1 T (in court)
Incumbent vs. Incumbent Races:
General:
IA-03: Boswell (D) vs. Latham (R)
OH-16: Sutton (D) vs. Renacci (R)
Primary:
AZ-06: Quayle (R) vs. Schweikert (R)
CA-30: Berman (D) vs. Sherman (D)
CA-44: Hahn (D) vs. Richardson (D)
IL-16: Kinzinger (R) vs. Manzullo (R)
LA-03: Boustany (R) vs. Landry (R)
MI-14: Peters (D) vs. Clarke (D)
NJ-09: Rothman (D) vs. Pascrell (D)
OH-09: Kaptur (D) vs. Kucinich (D)