Just reported on MSNBC: the CDC has been prohibited from doing contact tracing for any of the COVID infections at the White House or Trump's contacts.
Update: just reported that the White House isn't going to do any contract tracing.
My take on why no contact tracing is because it would prove that the White House is a super spreader COVID hot spot. And it would prove that not wearing masks or social distancing spreads the virus.
Update: it's been reported that many White House staff are very upset by lack of contact tracing. Including staff on Air Force One. They don't know how much risk they have except by reading news reports. Numerous Secret Service agents and helicopter pilots need to quarantine.