Republican presidential candidate former Pennsylvania Sen. Rick Santorum speaks as his wife Karen, right, listens during a primary night watch party Tuesday, Feb. 7, 2012, in St. Charles, Mo. (AP Photo/Jeff Roberson)
March 10, 2012 5:45:55 PM PST
DAVID ESPO AP Special Correspondent
WASHINGTON - March 10, 2012 --
Rick Santorum won the Kansas caucuses in a rout on Saturday and Republican presidential front-runner Mitt Romney countered in Wyoming, a weekend prelude to suddenly pivotal Southern primary showdowns in the week ahead.