President Obama is returning to Chicago today to celebrate his 50th birthday. A big bash is planned for this evening in the Aragon Ballroom. It’s a surprise party, though, so try to keep it quiet.

Fifty is a nice age for an American president: a year for every state, even the red ones. Tea Partiers can’t believe Obama is turning 50. They want to see his birth certificate.

The party-goers will be forking over as much as $35,800—an odd amount, but definitely more reasonable than $36,000. Obama and the Democratic National Committee will split the proceeds. The pricey tab shows that Obama really is willing to tax the rich, so long as half the take goes to his reelection fund.