(CNN) President Donald Trump on Saturday repeatedly blamed governors for not making full use of coronavirus testing capacity in their states, even as several Democrat and Republican governors said they are facing shortages of critical supplies to conduct tests.

"They don't want to use all of the capacity that we've created. We have tremendous capacity," Trump said during a briefing at the White House. "They know that. The governors know that. The Democrat governors know that. They're the ones that are complaining."

Trump's criticism was the latest missive the President has fired at Democratic governors who in recent days have pressed the federal government for more help to address testing shortages amid mounting pressure for them to begin to reopen their economies.

The President's comments come after the White House released a three-part guideline this week, saying that states can enter the first phase toward reopening once they see a continued decrease over two weeks. As of Saturday afternoon, there were more than 732,000 confirmed cases in the US and at least 38,600 people had died, according to Johns Hopkins University.

Even as Trump said his administration is working with governors to "help them find and unlock the vast unused testing capacity that exists in their states," the President suggested it was the governors' fault for not making use of that capacity.

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