It was and is a strange duo, the lady and the champ, carefully tapping through their predetermined steps in the appropriately named Continental Ballroom of the Hilton Chicago on a snowy Monday morning.A cast of others was there, too. Defense Secretary Robert Gates, just named to a new term, and Gov. Janet Napolitano, the next homeland security chief. Attorney General-designate Eric Holder and the next national security adviser, retired Marine Corp Gen. Jim Jones.But it was the dance between the lanky Chicagoan and the tough-talking New Yorker that drew all eyes, and Barack Obama and his chosen secretary of state, Hillary Clinton, hit their marks.In what wasn’t so much a sultry samba or wonkish square dance but a waltz sans elegance, both bent over backward – rhetorically – to convince a watching nation that past feuds are over and one happy national security team exists.