Democratic presidential nominee Joe Biden voted in person on Sept. 14.
Biden cast his ballot in the state primary election along with his wife, Jill Biden.
The couple traveled to the New Castle County Board of Elections in Wilmington, a 15-minute car ride from their home.
Biden's campaign said the nominee and his wife made an appointment to cast their ballots.
Asked what his message is to Delaware voters, Biden said: "Vote, vote, vote."
He said he was voting early, one day before the primary, because he planned to travel on Sept. 15.
“Because I’m going to be in—where am I tomorrow?” Biden asked those with him. Aides and his wife shouted, "Florida."
According to his campaign, Biden was scheduled to travel to the state for a roundtable with veterans and a Hispanic Heritage Month event.
Biden said he encourages people to vote early if they can. He also said he believes every vote will be counted in the upcoming national election.
“I have confidence that Trump will try to not have that happen but I’m confident the American public is going to insist on it," he said.
Biden over the weekend traveled to St. Joseph on the Brandywine church for his granddaughter's confirmation. He spent the bulk of his time over the weekend out of the public eye.
The nominee planned to deliver remarks in Wilmington later Sept. 14 about the ongoing wildfires in the western United States.
"Biden will discuss the threat that extreme weather events pose to Americans everywhere, how they are both caused by and underscore the urgent need to tackle the climate crisis, and why we need to create good-paying, union jobs to build more resilient infrastructure," according to his campaign.
President Donald Trump, whom Biden is challenging, spent Sept. 13 holding roundtable and a large rally in Nevada.
Several thousand people attended the event at Xtreme Manufacturing in Henderson.
It was Trump's first indoor rally since June 20.
Trump stressed the importance of voting in November. Whoever wins will get at least one Supreme Court nomination and control of the Department of Justice and other agencies, he said.
"Biden will always do whatever the radical left demands and, if elected, his radical supporters won't just be causing mayhem on the streets, they'll be running the Department of Justice, the Department of Homeland Security and, by the way, the United States Supreme Court, and we will have a very different country," he said.
"Our country will never be the same, we'll never be able to recover from it. So you've got to get out on November 3rd or early voting. You've got to get out and vote and you could send your ballot and then you have to check that your ballots counted because they might not count your ballot in this state."
Trump voted by mail in the Florida primaries last month.
The president headed to California on Sept. 14 to tour damage inflicted by wildfires. He planned to hold a Latinos for Trump Coalition roundtable in Phoenix, Arizona, later in the day.