Updated Mar 8, 2020 - Health

Washington, D.C., announces first presumptive positive coronavirus case

Bottles of hand sanitizer in coronavirus pop-up store in Washington, D.C., March 6. Photo: Nicholas Kamm/AFP via Getty Images

Washington, D.C., announced its first presumptive positive novel coronavirus case on Saturday and Mayor Muriel Bowser confirmed later that a second person who visited the city had presented with symptoms in Maryland.

Details: Bowser told a news conference that the D.C. resident in his 50s who tested positive to the virus had "no history of international travel and no close contact with a known case."

The big picture: Separately, a CPAC 2020 attendee tested positive for COVID-19 in New Jersey on Saturday, the American Conservative Union announced. CPAC was held at the Gaylord National Resort and Convention Center in Maryland, located near the heart of D.C.

Editor's note: This article has been updated with new details throughout.

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Sen. Maria Cantwell staffer tests positive for the coronavirus

Sen. Maria Cantwell at the U.S. Capitol in January. Photo: Chip Somodevilla/Getty Images

A staffer in the Washington, D.C., office of Sen. Maria Cantwell (D-Wash.) is in insolation after displaying symptoms of the novel coronavirus for which they subsequently tested positive, a statement released Wednesday night confirms. The office is now serving constituents remotely.

Why it matters: This is the first known case of a congressional staffer becoming infected with the virus. "The individual who tested positive for COVID-19 has had no known contact with the senator or other members of Congress," the statement notes. "The senator is requesting that testing be done on any other staffers who have been in contact with the individual and show symptoms."

Go deeper: Lawmakers self-quarantine after contact with confirmed coronavirus cases

Editor's note: This article has been updated with more details on the case.

Trump tests negative for coronavirus

President Trump responds at the press briefing room at the White House on Saturday. Photo: Tasos Katopodis/Getty Images)

President Trump's test for the novel coronavirus came back negative, his physician said Saturday.

Why it matters: Trump was tested Friday night after people he had met with at his Mar-a-Lago resort in Florida last weekend showed symptoms or tested positive, including Brazilian President Jair Bolsonaro's press secretary.

Washington state officials confirm second coronavirus death in U.S.

Coronavirus contained within the endoplasmatic reticulum of a vero E6 cell. Photo: BSIP/UIG Via Getty Images

A second person has died in the U.S. from the novel coronavirus — and just like the first one, it's in Washington state, King County Public Health confirmed in a statement Sunday night.

The big picture: Washington Gov. Jay Inslee (D) declared a state of emergency Sunday in response to new infections in the state. Washington now has 13 cases. Several of those infected are from the Life Care Center of Kirkland nursing home. Unlike the first coronavirus death in the U.S., the man in his 70s with underlying health conditions who died on Saturday was a resident of the home. Both patients died in EvergreenHealth Medical Center in Kirkland.

Go deeper: Washington state officials confirm first coronavirus death in U.S.

Editor's note: This article has been updated with new details, including Washington case numbers.