[1] As of the primary on April 7, former vice president Joe Biden and senator Bernie Sanders were the only candidates left in the race.

Even though results were only released six days later, Sanders dropped out and suspended his campaign the next morning (after he had already heavily scaled it back and focused on the treatment of the pandemic crisis), leaving Biden as the party's presumed presidential nominee.

[2][3] Nevertheless, Sanders declared that he wanted to continue competing for delegates at the national convention in subsequent primaries.

In the open primary, candidates had to meet a threshold of 15% at the congressional district or statewide level in order to be considered viable.

Concerns were raised by health officials, poll workers, and voters that in-person voting at the height of the pandemic would be unsafe for vulnerable individuals.

[12][13] The Supreme Court of the United States "did not alter the provision in Conley's amended order which prohibits the reporting of results until April 13".