There are several planes used as presidential and VIP transports in the Mexican Air Force. Their designations start with "TP", which stands for "Transporte Presidencial". These are the TPs I know about:
- TP-01: 757-200
- TP-02: 737-300
- TP-03: 737-200
- TP-07: Gulfstream III
I believe, I'm not really sure, that the callsign used when the President is on board, no matter which aircraft, is changed to AP-01.
Finally, I know that Fox doesn't always use the 757. For example, for short flights, like from Mexico City to Fox's ranch in Guanajuato, the GIII is often used. Last week, the President flew to Sacramento, California, in TP-02.
"... for there you have been and there you will long to return."