South Carolina is a Republican stronghold. The Palmetto State has voted Republican in 13 of the last 14 presidential elections. The sole exception came in 1976, when the state supported Jimmy Carter. In 2020, South Carolina was the fourth Democratic contest and was one the most impactful. See 2020 primary results
CNN will broadcast a projected winner only after an extensive review of data from a number of sources.
"Flipped seat" denotes a race where the 2020 projected winner is from a different party than the previous winner or incumbent.
Both Maine and Nebraska allow electoral votes to be split. In Maine, two of four electoral votes go to the statewide winner and one electoral vote goes to the winner in each of the two congressional districts. In Nebraska, two of five electoral votes go to the winner of the statewide vote. One electoral vote goes to the winner in each of Nebraska's three congressional districts.