A San Francisco resident who was in attendance at South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBillionaire who donated to Trump in 2016 donates to Biden The Hill's Morning Report - Sponsored by Facebook - GOP closes ranks to fill SCOTUS vacancy by November Buttigieg stands in as Pence for Harris's debate practice MORE's Napa Valley "wine cave" donor event detailed the gathering in an op-ed published by The Washington Post.

The author, Bill Wehrle, a vice president of a health care company, pushed back against Sen. Elizabeth Warren Elizabeth WarrenOvernight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds On The Money: Half of states deplete funds for Trump's 0 unemployment expansion | EU appealing ruling in Apple tax case | House Democrats include more aid for airlines in coronavirus package Warren, Khanna request IG investigation into Pentagon's use of coronavirus funds MORE's (D-Mass.) "billionaires in wine caves" comment.

"Of the roughly 50 folks in attendance, plenty were people of means, and certainly all of us who were able to go to an event like that should consider themselves lucky," he said in his op-ed, adding that he's "neither a billionaire nor a millionaire."

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He said that during the event, Buttigieg spent an hour taking questions from those in attendance.

To attend the dinner, Wehrle explained, donors were asked to "max out," meaning give the legal limit campaign donation of $2,800.

He also asserted that Warren's claim of people drinking $900 bottles of wine was false.

"The wine, a 2016 cabernet, is the host couple’s signature bottle and it was very good," he wrote.

"But it is available online for $185 per bottle — far more than I’ve ever paid in my life for a bottle of wine, but not unusual for wine collector enthusiasts," he added.

Wehrle concluded his op-ed by suggesting that "Democrats can find more important things to debate in the United States of America at this dark hour."