WASHINGTON (AP) — A grim blame game with partisan overtones is breaking out over COVID-19 deaths among nursing home residents, a tiny slice of the population that represents a shockingly high proportion of Americans who have perished in the pandemic.

The Trump administration has been pointing to a segment of the industry — facilities with low federal ratings for infection control — and to some Democratic governors who required nursing homes to take recovering coronavirus patients.

Homes that followed federal infection control guidelines were largely able to contain the virus, asserts Seema Verma, head of the Centers for Medicare and Medicaid Services, or CMS, which sets standards and pays the bills. “Trying to finger-point and blame the federal government is absolutely ridiculous,” she says.

Verma says data collected by her agency suggest a connection between low ratings on safety inspections and COVID-19 outbreaks. But several academic researchers say their own work has found no such link.

Advocates for older people say the federal government hasn’t provided needed virus testing and sufficient protective gear to allow nursing homes to operate safely. A White House directive to test all residents and staff has been met with an uneven response.

“The lack of federal coordination certainly has impeded facilities’ ability to identify infected persons and to provide care,” Eric Carlson, a long-term care expert with the advocacy group Justice in Aging, told lawmakers. “That absence remains important as facilities are attempting to open up, which requires an extensive reliance on testing.”

Democrats are critical of the Trump administration response.

“We need action,” says Sen. Bob Casey, D-Pa. “We need a plan from CMS and we need resources to stop the spread of COVID-19 in nursing homes.”

Nationwide, more than 45,500 residents and staff have died from coronavirus outbreaks at nursing homes and other long-term care facilities, according to a running count by The Associated Press. That’s about 40% of more than 115,000 total deaths. Nursing home residents are less than 1% of the U.S. population.