Vice-presidential nominees have “virtually no impact,” according to Donald Trump, when recently asked if J.D. Vance would be ready to take over "on day one, if he has to be." This clear snub of his running mate when speaking to the National Association of Black Journalists, had less to do with Trump’s thoughtful analysis of voters’ intentions during presidential elections and more to do with the fact that the twice-impeached and criminally convicted former president cannot abide sharing the limelight with anyone — not even where a supportive platitude would help their shared ticket and therefore his electoral chances.