Some of the most direct splits with the administration have come on the issue of testing, which, while markedly improved since the earliest days of the U.S. outbreak, is still not where experts say it needs to be, with delays in test results sometimes stretching a week or more in some areas.

Trump’s former chief of staff Mick Mulvaney panned the administration’s testing abilities in an op-ed on Monday, calling the struggles his family encountered when trying to get tested and the wait time for results afterward “simply inexcusable.”…

In a visit to a South Carolina hospital later in the day, Sen. Lindsey Graham, one of Trump’s staunchest allies on the Hill, said a lack of timely testing was one of the key issues raised during his visit.

“We just don’t have enough testing in real time for the population as a whole,” he said, suggesting the White House could invoke the Defense Production Act to compel companies to produce testing supplies or incentivize pool testing.