Sasse’s exit from Senate prompts GOP unease over replacement

OMAHA, Neb. (AP) — When Republican Jim Pillen becomes Nebraska’s governor next month, one of his first acts will likely be to name his predecessor and biggest supporter to fill an open U.S. Senate seat. Pillen was elected in November in large part because of current Gov. Pete Ricketts ’ backing, and now he can return the favor by appointing him to the Senate, more than 15 years after Ricketts spent $12 million of his own money on a failed bid…