J.D. Vance or JD Vance? Depends who you ask — including Trump.

MILWAUKEE — Republican presidential nominee Donald Trump named his vice presidential running mate today.

It's Sen. J.D. Vance of Ohio.

Or is it Sen. JD Vance of Ohio?

Depends on who you ask.

Trump's official announcement Monday afternoon used "JD."

So did Republican National Committee Vice Chairwoman Lara Trump. Sen. John Fetterman (D-PA), is also on Team "JD" — even if he's in no way a supporter of the man who could become vice president.

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But in an email to supporters, the National Republican Congressional Committee went a different route, urging supporters to "congratulate J.D. Vance" with an online message and political donation.

Make America Great Again Inc., a flagship pro-Trump super PAC, also employed punctuation in J.D.

Vance himself doesn't help clarify matters.

His best-selling book "Hillbilly Elegy" lists "J.D. Vance" as the author.

An image of the cover of Hillbilly Elegy, written by J.D. Vance, Donald Trump's newly named vice presidential nominee. (HarperCollins)

His official U.S. Senate page says "JD Vance."

And Vance has it both ways on X, formerly Twitter, where his account names him both as "J.D." and "JD."

X account for Sen. J.D. Vance. (X)

Raw Story joins various publications including the New York Times and Los Angeles Times in using "J.D." in its articles. CNN and Fox News, which agree on little, both employ "JD."

So, Raw Story put the question to the Trump campaign: For the purposes of the Trump-Vance ticket, which style do you prefer?

"JD (no periods in between letters)," Trump spokesman Steven Cheung emailed back.