The upcoming rally in Arizona for former President Donald Trump is stirring up speculation about a potential endorsement from Robert Kennedy Jr., who is currently running an independent campaign for the White House. What Happened: Trump’s campaign has teased a “special guest” for the rally, scheduled for Friday in Glendale, Arizona, according to The Hill. This announcement has fueled rumors that Kennedy may be planning to end his independent bid and endorse Trump. Adding to the speculation, Kennedy is set to speak in Phoenix earlier the same day. When asked about the possibility of Kennedy joi…