Washingtonn — Minutes after taking the oath of office Wednesday, Republican Ron Johnson's first words on how it feels to be a United States senator were: "It feels very nice. I'm looking forward to getting to work and try to limit the size and scope of the federal government."He may be a newcomer to politics, but there are no mixed signals with the wealthy Oshkosh businessman. In an interview just after his swearing-in, the freshman lawmaker returned again and again to the theme of his campaign: shrinking government. Consider his choice of legislative mentor, Oklahoma Republican Tom Coburn, perhaps the...