Victorious Trump attacks Clinton on NAFTA

“She will not be a great president, she will not be a good president, she will be a poor president," he said of Hillary Clinton, the likely Democratic nominee.
"She doesn’t understand trade, her husband signed, perhaps in the history of the world, the worst trade deal, in NAFTA," he continued. 
The businessman is now the presumptive GOP nominee.   
Flanked by his wife, son and daughter, Trump took a muted tone despite the major win.
"We are going to win big and it's going to be America first," Trump said.