Six of the recognized Republican presidential candidates who had been running for president, but who have dropped out, still have not endorsed any other Republican for the nomination. They are Jeb Bush, Jim Gilmore, Lindsey Graham, Mike Huckabee, Rand Paul, and Scott Walker.
Graham had endorsed Bush after Graham dropped out, but then Bush dropped out, and Graham hasn’t made a new endorsement, although he has hinted he might endorse Ted Cruz.
Here are the endorsements made by the other ex-candidates: Donald Trump has been endorsed by Ben Carson and Chris Christie; Ted Cruz has been endorsed by Carly Fiorina and Rick Perry; Marco Rubio has been endorsed by Bobby Jindal, George Pataki, and Rick Santorum. No ex-candidate has endorsed John Kasich.