Update, 3:30 p.m.: Judith Nathan has released a statement indicating that all tests performed on her husband while he stayed at the hospital last night and today were “precautionary” in nature. Giuliani is expected to be released this hour and will head straight to NYC.

Original, 2:56 p.m.: Rudy Giuliani’s illness is much more serious than the flu and may force him to drop out of the GOP race for president, Big Head DC is hearing from a person close to the former NYC mayor. A second source has not yet confirmed this information. Giuliani’s wife is expected to make an announcement soon.

Republican candidate Tom Tancredo dropped out of the race today and endorsed Mitt Romney.