Biden mandating everyone except Democrat staffers, USPS, and pharmaceutical conglomerates take Covid-19 vaccine

What is going on with the Biden Administration with regard to Covid-19 vaccines? President Joseph Biden has just announced Covid-19 mandates making all federal employees, as well as companies with 100 or more employees to vaccinate every one of them, or face heavy fines. Earlier this year we were told that this kind of treatment wouldn’t ever be forced onto the citizens of America. What has changed to the point where we are now, for the first time, forcing people to take a vaccine that has not gone through time trials and efficacy ratings, unlike every other vaccine and therapeutic since the formation of government medical regulatory agencies? Something more is afoot.A more sinister note: All administration staff are EXEMPT from the vaccines, as well as the USPS, whose union officials have actually come out and stated that this is leverage they are enacting on the Biden Administration for their effort in fortifying the 2020 elections for the Democrats. In addition, exemptions are being given to all large Pharmaceutical companies who manufacture the various vaccines. What gives?