White House coronavirus response coordinator Dr. Deborah Birx said Sunday that the pandemic is not under control because Americans "are on the move" and that the virus is more widespread than in the early stages.

Appearing on CNN's "State of the Union," Birx said the coronavirus "is extraordinarily widespread. It's into the rural as equal urban areas."

Speaking from Delaware, Birx warned about a resurgence across the Midwest and said she is monitoring 20 states. She also noted that Americans have not made strong enough efforts to stay home.

“I can tell you across America right now people are on the move,” Birx said. “And so all of our discussions about social distancing and decreasing gatherings to under 10 ... as I traveled around the country, I saw all of America moving.”

Birx warned that those living in rural areas "are not immune or protected from the virus" and echoed the importance of wearing a mask and committing to hygiene procedures.

The comments from Birx come as House Speaker Nancy Pelosi on Sunday expressed a lack of confidence in her.

"I think the president is spreading disinformation about the virus and she's his appointee. So I don't have confidence there, no," Pelosi said on ABC's "This Week."

The U.S. has the most coronavirus cases in the world. As of Saturday morning, the U.S. has over 4.6 million COVID-19 cases and a death toll over 154,000, according to data compiled by Johns Hopkins University.