WHAT WE KNOW:

WHAT WE KNOW: HOW TRUMP WAS INFECTED

It's not clear, but attention is focusing on a White House event Sept. 26 introducing Trump’s Supreme Court nominee. Trump gathered more than 150 people in the Rose Garden, where they mingled, hugged and shook hands — overwhelmingly without masks. Photos also show several indoor receptions, where Trump’s nominee, Judge Amy Coney Barrett, her family, senators and others gathered in the close quarters in the White House.  Among those who attended who have now tested positive: former New Jersey Gov. Chris Christie, White House counselor Kellyanne Conway, the president of the University of Notre Dame and at least two Republican lawmakers — Utah Sen. Mike Lee and North Carolina Sen. Thom Tillis.  There's no way to know for sure if the Rose Garden event was where Trump — who typically shuns a mask and has kept holding big public gatherings during the pandemic — was exposed. The president had a full week of official and campaign events before his hospitalization Friday. A third Republican senator, Ron Johnson of Wisconsin, announced his positive test Saturday, and he had not attended Barrett’s nomination kickoff.  The administration says a White House medical team is tracing contacts