That's the best Border policy of them all, by far. I built the Wall, and then added more. Remain in Mexico, we said. It all worked!!!'
Trump, who was voted out in January 2021, appeared to suggest that during his presidency, it was much harder for migrants to get into America.
The former president held a rally in Ohio last week and uses Truth Social in a bid to drum up support.
He has previously hit out at Biden on a number of occasions.
His words come days after more migrants were bussed across the country and continue to stream through in their hundreds.
The 50 Venezuelan migrants who were flown into Martha's Vineyard last week filed a class action suit against Ron DeSantis, Florida's governor, who arranged the flight from Texas.
They argued that they 'experienced cruelty akin to what they fled in their home country'after being bussed into Martha's Vineyard, the immigrants were then carted off by officials to a military base on Cape Cod.