This is a 2028 Republican primary handicapping discussion, neutral but skeptical about JD Vance's current standing.

• Vance, Rubio, and others are all expected to run in 2028 despite saying they aren't.
• Vance is seen as too hard to read — people don't know what he actually thinks on big issues like Trump's Iran strikes, and he has lost trust he'll need to win.
• His close friendship with Tucker Carlson is called a serious problem, since Tucker is now fighting the administration Vance serves.
• Rubio is viewed as the safer bet to hold the Trump coalition together, with attacks on him as "too liberal" unlikely to stick after a strong run as Secretary of State.
• History favors a sitting VP only if the president endorses him — so Vance's whole path may hinge on whether Trump backs him.

Outlook: The 2028 race likely turns on whether Trump endorses Vance; without it, expect a wide-open primary with Rubio well positioned.