WASHINGTON — In a sometimes-awkward sales pitch, former Vice President Joe Biden suggested Monday that he was the Democratic candidate who could unite black and white America — and win broad swaths of the South.

“First of all, I plan on campaigning in the South. I plan, if I’m the nominee, winning Georgia, North Carolina and South Carolina, believe it or not,” Biden said Monday at the Poor People’s Campaign Candidate Forum in Washington, DC. “I believe we can win Texas and Florida, if you look at the polling data now.”

While Florida and North Carolina had gone to President Obama in the past, voters in the other three states have selected Republican presidential candidates for years.

But Biden — the frontrunner in a field of 24 Democratic hopefuls — pointed to his history of attracting both black and white voters when running for office in Delaware.

“So the point is, you’ve got to make it clear to people that we’re all in this together. We don’t do that very well,” Biden said. “But my son Beau, before he died he was the attorney general. We were the only two Caucasian guys who won downstate, as they say, and won overwhelmingly in the black community.”

Biden noted how his home state of Delaware held the eighth largest African American population in the country, while in the southern part of the state, “We couldn’t make up our mind, exactly, which side we wanted to be in the Civil War.”

“With a lot of poor folks down there, those poor folks — what they call ‘hanging chickens’ in the chicken industry … most of them Caucasian,” Biden described.

The former veep also boasted that he had been called to campaign for Alabama Sen. Doug Jones, a Democrat who successfully beat Republican Roy Moore in a special election in December 2017.

Jones won, in part, because of an alliance between black and white Alabama voters.

“I was the only person that went down there to speak,” Biden said.

“I was the only person who wasn’t a person of color,” he said, quickly amending his statement.

Sen. Cory Booker (D-N.J.), an African American lawmaker also running for president, aided Jones’ campaign.

Former Massachusetts Gov. Deval Patrick, who also is black, stumped for Jones as well.

Biden — who has a reputation for being gaffe-prone — started the Q&A, led by the Revs. Dr. William Barber II and Dr. Liz Theoharis, and MSNBC’s Joy Reid, on a wobbly note as well.

“Look, I’m Joe Biden, I’m Joe Biden’s husband,” he said, meaning to mention his wife, Jill’s, name. “And today’s my anniversary. And she’s still with me. So God love her.”

“I’m the father of Ashley Biden. She worked at the Delaware Center for Justice of a long time, and my son Hunter, who was the head of the World Food Program USA for years,” the ex-veep said.

Ashley Biden left the Delaware Center for Justice in March to work with her nonprofit Livelihood full-time, she told The Post last week.

In recent months, Hunter Biden’s dating life has eclipsed his work, as he dated his late brother’s widow, Hallie.

Then, last week, he secretly married South African beauty Melissa Cohen.

The Biden campaign has been quiet when asked about the impromptu marriage, with the 2020 hopeful simply answering “yes” when asked if his son had gotten remarried.