During the question and answer portion of a virtual fundraiser with former South Bend Mayor Pete Buttigieg, Biden told supporters, "I think he (Trump) is gonna try to kick back the election somehow, come up with some rationale why it can’t be held."
Trump has not suggested he would push back the election, and the date of the election is set in federal law. Congress sets the "times, places, and manner" of elections," meaning only Congress would be able to change the date of the election.
Referencing current controversy over funding for the U.S. Postal Service, Biden said, "he’s going to do all he can to make it very hard for people to vote. That’s the only way he thinks he can possibly win.”
The Postal Service has taken a financial hit during the coronavirus pandemic, which some Democrats have said could endanger voting by mail.
Speaking about foreign interference in American elections, Biden said, "You can be assured between (Trump) and the Russians there is going to be an attempt to interfere."
Biden said, if elected president, he would “make it clear to foreign governments that... they will have to pay for interfering in our election."
Biden also called the Wisconsin primary election a "giant warning flare" to the nation about the dangers of voting during the coronavirus pandemic.
The Milwaukee Journal Sentinel reported at least seven coronavirus cases were related to in-person voting in the state's primary on April 7, though a "surge" of cases had not yet been detected in the aftermath of the primary.
"We have to figure out how we are going to conduct a full and fair and safe election in November, and no one should have to risk their lives to cast a ballot," he said.
Biden made his Thursday remarks during a virtual fundraiser with 670 people, including celebrities like actors Kristin Chenoweth, Billy Porter, and George Takei.
This article originally appeared on USA TODAY: Joe Biden says Trump will 'try to kick back the election' in November