Louisiana is the first state to delay any elections since the Coronavirus outbreak began in the United States.
The virus has effectively put the campaign efforts of Sen. Bernie Sanders (I-VT) and former Vice President Joe Biden on hold, as neither candidate has held a campaign rally since earlier this week.
The immediate reaction was tempered, as a top official with the Biden campaign said elections officials should instead consider a larger use of absentee ballots and voting by mail.
"Voting is at the very heart of who we are as a democracy," said Kate Bedingfield.
Louisiana has used the same emergency provision in law to delay elections before, both in 2005 and again in 2008 after major hurricanes struck the state.
Four states are scheduled to vote on Tuesday: Arizona, Ohio, Illinois and Florida.