President Donald Trump on Sunday morning railed against Illinois Governor J.B. Pritzker, “fake news” CNN and “a very small group of certain other Governors” for their “shortcomings.”

Pritzker fired back with a message of his own:

“ ‘Get off Twitter & do your job.’ ”

Before the Twitter TWTR, -0.82% feud erupted, Pritzker drew Trump’s ire by telling CNN that an inadequate response by the administration has forced states affected by coronavirus to compete for resources. It “should have been a coordinated effort by the federal government,” he said.

Earlier in the day, Trump tweeted out that he was “working very well with States and our Nation’s Governors. #TEAMWORK” However, Pritzker wasn’t the only governor complaining.

New York Gov. Andrew Cuomo also went after Trump for leaving the states to compete, which has led to price gouging by manufacturers of needed medical goods.

“If we don’t get the equipment, we could lose lives that we could otherwise save,” he said. “They need these materials now, and only the federal government can make that happen.”

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Governors and state officials have been burdened with acquiring masks and other critical items to battle the pandemic, with Trump last week telling them to work with private companies.

Watch Cuomo’s address:

In the U.S., there are now 26,747 diagnosed COVID-19 cases and 340 deaths, according to the latest tally from Johns Hopkins University. Globally, there are now 315,992 cases with at least 13,589 deaths. More than 94,176 people have recovered.

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