There's an apostrophe battle brewing among grammar nerds. Is it Harris' or Harris's?

Whatever possessed Vice President Kamala Harris to pick Minnesota Gov. Tim Walz as her running mate, it probably wasn’t a desire to inflame arguments about apostrophes. But it doesn’t take much to get grammar nerds fired up.

“The lower the stakes, the bigger the fight,” said Ron Woloshun, a creative director and digital marketer in California who jumped into the fray on social media less than an hour after Harris selected Walz last week to offer his take on possessive proper nouns.

The Associated Press Stylebook says “use only an apostrophe” for singular proper names ending in S: Dickens’ novels, Hercules’ labors, Jesus’ life. But not everyone agrees.

Debate about possessive proper names ending in S started soon after President Joe Biden cleared the way for Harris to run last month. Is it Harris' or Harris's? But the selection of Walz with his sounds-like-an-s surname really ramped it up, said Benjamin Dreyer, the retired copy chief at Random House and author of “Dreyer’s English: An Utterly Correct Guide to Clarity and Style”.