Leaders balance optimism with threat of second virus wave

Olbia Fernandez looks at her family Sunday as they wave to her from their vehicle during a Mother's Day drive-by caravan at an assisted living facility in Kendall, Fla. (Daniel A. Varela/Miami Herald via AP)

HOUSTON — Trump administration officials spoke optimistically about a relatively quick rebound from the coronavirus Sunday as life within the White House reflected the stark challenges still posed by the pandemic, with Vice President Mike Pence “self-isolating” after one of his aides tested positive.