FOR COLOMBIA, A CHILL ON HILL By ROBERT D. NOVAK May 10, 2007 -- COLOMBIA'S President Alvaro Uribe re turned to Bogota this week in a state of shock. His three-day visit to Washington to win over Democrats in Congress was described by one U.S. supporter as "catastrophic." Colombian sources said Uribe was stunned by the ferocity of his Democratic opponents, and Vice President Francisco Santos publicly talked about cutting U.S.-Colombian ties. (snip) dictator Hugo Chavez can only exult in Uribe's embarrassment as he builds an anti-U.S. bloc. (snip) A truer portent of the Colombian reaction to the rebuff...