US Vice President Mike Pence is self-isolating away from the White House.
According to Reuters, the move comes after an aide was diagnosed with the novel coronavirus COVID-19.
Pence has repeatedly tested negative, including on Sunday.
President Donald Trump has also been recently exposed to COVID-19, via his valet.
At Mar-a-Lago, Trump sat with a member of Brazilian President Jair Bolsonaro's retinue, who also tested positive.