Presumptive Republican nominee Donald Trump is sparring with the Chamber of Commerce on Twitter following criticism of his speech on trade policy.

On Tuesday, the New Yorker separated himself from Republicans who support the North American Free Trade Agreement (NAFTA) and the Trans Pacific Partnership (TPP) trade pact.

The @USCHAMBER must fight harder for the American worker. China, and many others, are taking advantage of U.S. with our terrible trade pacts — Donald J. Trump (@realDonaldTrump) June 29, 2016

Why would the USChamber be upset by the fact that I want to negotiate better and stronger trade deals or that I want penalties for cheaters? — Donald J. Trump (@realDonaldTrump) June 29, 2016

Trump’s posts on Twitter come after the Chamber tweeted during Trump’s speech, saying, “Under Trump’s trade plans, we would see higher prices, fewer jobs, and a weaker economy.”

According to CNN, the Chamber argues that NAFTA created roughly five million jobs and also charged that the TPP could add $77 billion in America’s economy in less than nine years.

“Even under best case scenario, Trump’s tariffs would strip us of at least 3.5 million jobs,” the Chamber also tweeted.