Freshman Sen. Claire McCaskill uttered seven words rarely heard from a sitting lawmaker: “It’s OK if I don’t get re-elected.” In a profile in the St. Louis Post-Dispatch Tuesday, the Missouri Democrat, who was elected just three years ago, offered some uncommon candor on life in the Senate and her frustration with the way Washington works. “I’m very frustrated with some of the habits around here,” she said. “What happens around here is that so many people are more focused on getting everybody to love them and getting re-elected than they are on solving the really hard stuff. Because when...