This question specifically refers to the presidential elections in 2020 and 2024 and the only districts that apply to this question are those that specifically Nebraska and Maine have decided to assign separate electoral college votes.

These are the states and districts that voted by over 55% for a candidate in the 2020 presidential election:

For Biden:

Vermont

Massachusetts

Maryland

Hawaii

California

New York

ME-1

Rhode Island

Connecticut

Delaware

Washington

Illinois

New Jersey

Oregon

Colorado

For Trump:

NE-3

Wyoming

West Virginia

Oklahoma

North Dakota

Idaho

Arkansas

Kentucky

Alabama

South Dakota

Tennessee

Louisiana

Nebraska (statewide)

Utah

Mississippi

Indiana

Montana

Missouri

Kansas

NE-1

South Carolina

If any of these states or districts end up voting for a candidate in the 2024 presidential election of a different party to the one they voted by over 55% for in the 2020 presidential election, then this market will resolve YES.

In other words, if a state that Biden won with over 55% of the vote in the 2020 presidential election is won by a non-Democrat in the 2024 presidential election, or if a state that Trump won with over 55% of the vote in the 2020 presidential election is won by a non-Republican in the 2024 presidential election, this question will resolve YES. This question will also resolve YES if NE-1, NE3, or ME-1 flip in the same way assuming winning them still grants electoral votes per state law.