Joe Biden has a message for Americans who agree with President Trump’s tweet about freshman Democratic lawmakers going back to the countries where they “originally came from.”

“I’d say I’m ashamed of you,” charged the former vice president and 2020 Democratic candidate.

“I’d say that to anybody who’s that racist,” he told CBS News political correspondent Ed O’Keefe.

“The idea that you’re going to tell somebody when you disagree with them to go back to [the country they’re from], it’s all about race and it’s all about ethnic origin,” Biden added.

The presidential hopeful has been one of the several Dems leading the charge in defending Reps. Alexandria Ocasio-Cortez, Rashida Tlaib, Ayanna Pressley and Ilhan Omar — known collectively as “the Squad” — following Trump’s jab on Twitter Sunday.

​”So interesting to see ​’​Progressive​’​ Democrat Congresswomen, who originally came from countries whose governments are a complete and total catastrophe, the worst, most corrupt and inept anywhere in the world (if they even have a functioning government at all), now loudly​ ​and viciously telling the people of the United States, the greatest and most powerful Nation on earth, how our government is to be run​,” the president wrote in a series of tweets.

“Why don’t they go back and help fix the totally broken and crime infested places from which they came. Then come back and show us how​ it is done​,” he added. “​These places need your help badly, you can’t leave fast enough. I’m sure that Nancy Pelosi would be very happy to quickly work out free travel arrangements!​”

Only one of the four lawmakers is foreign-born, while the others all hail from the US.

“There has never been a president in American history who has been so openly racist and divisive,” Biden told reporters Monday after being asked about his comments. “It’s sickening.”

Trump’s beef with the “the Squad” appears to stem from their ongoing feud with House Speaker Nancy Pelosi. The congresswomen all voted against a $4.6 billion emergency spending bill last month for the border that Pelosi had backed.

“All these people have their public whatever and their Twitter world,” ​Pelosi told The New York Times​ in an interview published last week​. “But they didn’t have any following. They’re four people and that’s how many votes they got.”

Trump has publicly backed Pelosi, saying:“I think Cortez is being very disrespectful to somebody that’s been there a long time.”

“I deal with Nancy Pelosi a lot and we go back and forth and it’s fine, but I think that a group of people is being very disrespectful to her,” Trump told reporters outside the White House last Friday. “And you know what? I don’t think that Nancy can let that go on.”