Was Trump in Florida on that weekend? Maybe that KC-10 was supporting the fighter aircraft patrolling the TFR over Trump’s Florida home.
Here in the Chicago area when Obama was in town, I could visually see and hear fighter aircraft overhead patrolling the TFR. Occasionally, I would spot a KC-135 circling to support the fighters. My ADS-B receiver would pick up the KC-135s, but never the fighters.