Been tracking Slo Joe in AF1 for the last 40 or 45 minutes. He's in the Kansas City ARTCC high altitude sector. I just heard, plain as fucking day, AF1 check on at FL 350 with Kansas City. Verbatim: Kansas City, AF1 checking on at FL 350. Kansas City ARTCC: AF1, Roger.
So even though Flight Aware or the ADS-B Exchange does not show a callsign for AF1, the crew and ARTCC controllers are acknowledging AF1 as AF1. So the no callsign thing proves nothing as to whether or not Slo Joe is President.
Just now gave AF1 a frequency change.