Countdown to the Announcement: 3 days, 23 hours, 4 minutes. And all the Chicago supporters get a little more excited…

Obama would be the first U.S. president to take on such a direct role in lobbying for an Olympics event. […]

Obama is also mobilizing his administration on behalf of Chicago’s bid. Senior adviser Jarrett, Education Secretary Arne Duncan and Transportation Secretary Ray LaHood, will also be joining the president and first lady in Copenhagen. All are from Illinois.

They join a Chicago contingent already packed with more star power than a Hollywood red carpet.

The first lady is one of the few people who rivals her husband in visibility, and she’ll be joined by talk show host Oprah Winfrey, who trails only Angelina Jolie on Forbes’ annual Celebrity 100 list, a ranking of the rich and famous’ most powerful.

Also, in case you haven’t gotten a chance to see the Chicago plans in detail, here’s the best 5 minute video explaining where everything would be with cool renderings…