Presumptive GOP presidential nominee Donald Trump slammed the Trans-Pacific Partnership (TPP) on Thursday, calling it worse than the North American Free Trade Agreement (NAFTA).

“That will make NAFTA, in my opinion, look like a baby,” Trump said during a campaign event in New Hampshire.

{mosads}”Trans-Pacific Partnership — it’s over 5,000 pages long — every country that’s in that partnership has studied every word, every comma, every sentence, every paragraph; our guys probably haven’t even read it,” Trump continued.

“This is the way we do business,” he said.

Trump criticized presumptive Democratic nominee Hillary Clinton and former President Bill Clinton for past free trade deals.

“Hillary Clinton understood and backed, and Bill Clinton certainly as the president, initiatives — they are a disaster, and now they want to go into TPP, Trans-Pacific Partnership,” he said.

He continued to slam the presumptive Democratic nominee for pushing through a trade deal with South Korea “that killed another 100,000 jobs.”

“We have to get smart, folks,” Trump said.

The U.S. and Korea renegotiated their free trade agreement in 2010, when Clinton was secretary of State. She supported the TPP as well during negotiations but has since said Congress should reject the deal in its current form.

During the Trump event, he urged people to press Clinton on whether she would vow to rule out the passage of the TPP. Trump has vowed to fix current trade deals or leave the partnerships altogether.

In a speech earlier this week, Trump said he would demand a renegotiation of the agreement between the United States, Mexico and Canada. If countries refuse to negotiate, he said he would withdraw from the trade pact.