From a New York Times story on Obama & McCain's tenuous relationship:
"Examples of [Hillary & McCain's] mutual respect typically include a tale of holding a vodka-drinking contest in Estonia. Such a celebration may have been unlikely to happen with Mr. Obama, who on a trip to Russia in 2005 asked that his shot glass be filled with water."
Of course, it's possible Obama just didn't want to win this contest:

Recent comments
10 hours 27 min ago
10 hours 29 min ago
10 hours 36 min ago
10 hours 57 min ago
11 hours 2 min ago
11 hours 37 min ago
12 hours 11 min ago
13 hours 22 min ago
14 hours 29 min ago
14 hours 58 min ago