Few things come to mind:
POTUS & FLOTUS breeze through and country relaxes about threat. Covid becomes a cold like illness.
Announcement takes heat off FLOTUS tell all book. Also, shuts down presses because Kayleigh will probably quarantine due to daily contact with POTUS.
They've gone after Hope before. She was brought back to help with campaign. Must be good at what she does. She also must be close to daughter status to Trump. She started with Ivanka, then moved over to the campaign early. Been through thick & thin. If so, Trump will treat it the same as an attack on his family.
Timed with Parscale binge taken out of campaign activities. Parscale was also good at what he does.
Could very well be an attack on the campaign engine, seeing as it will stop the rallies, as well. Rallies must killing them and Biden must be weak.
Good time to hit back.