COVID-19 | A political adviser to US vice-president Mike Pence is suspected of sparking an outbreak of the coronavirus on his team that sidelined a senior official days before the presidential election, according to a current White House official and a former official familiar with the matter.

Marty Obst, a political strategist for Pence, was determined by contact tracers from the White House Medical Unit to be the likely origin of the outbreak, the two people said...