Two key figures, Vice President JD Vance and Secretary of State Marco Rubio, appear to be the front-runners. Trump himself suggested that Vance is the "likely" candidate to succeed him, while also leaving open the possibility of a Vance-Rubio joint ticket.

“I also think we have incredible people, some of the people on the stage right here,” Trump said Tuesday, while he stood near Homeland Security Secretary Kristi Noem and Attorney General Pam Bondi, among others. “So it’s too early, obviously, to talk about it, but certainly he’s doing a great job, and he would be probably favored at this point.”