(Newser) – President Trump took to Twitter on Sunday to issue a warning to America's neighbor to the south. "Stop the big drug and people flows, or I will stop their cash cow, NAFTA," Trump wrote, as CNBC notes, before he explicitly linked the renewed trade negotiations to his signature campaign promise by adding: "NEED WALL!" The US, Canada, and Mexico are currently renegotiating the North American Free Trade Agreement at Trump's insistence. Trump says NAFTA is bad for the US. "Mexico has got to help us at the border," Trump told reporters before he attended Easter services at an Episcopal church near his Florida home, per the AP. "If they're not going to help us at the border, it's a very sad thing between our two countries." Trump said. "A lot of people are coming in because they want to take advantage of DACA."

It was not immediately clear what Trump was referring to when he said people are coming to take advantage of the program, which granted the immigrants work permits. The Department of Homeland Security is not issuing new permits, though existing ones can be renewed. Trump did not explain what he meant when reporters asked as he entered the Church of Bethesda-by-the-Sea with the first lady and Tiffany Trump. Trump, who addressed reporters briefly before entering the church, again blamed Democrats for failing to protect the so-called Dreamers. "The Democrats blew it. They had a great, great chance, but we'll have to take a look because Mexico has got to help us at the border. They flow right through Mexico. They send them into the United States. It can't happen that way anymore," he said. (Read more Donald Trump stories.)

