NASHVILLE, Tenn. (AP) — Gov. Bill Haslam’s first four years in office included a struggle to exert authority over fellow Republicans in the Legislature on issues ranging from Common Core education standards to Medicaid expansion.But looking back on his first term after his landslide re-election on Tuesday, the Republican governor said there was no instance where he would have acted differently.“There’s nothing that I look back and say, ‘Oh, we really took the wrong approach to that,’” Haslam said. “There’s things where you always say we could do better and we will focus on doing it better.”Haslam defeated Democrat Charlie Brown — who didn’t have any organized campaign structure and raised no money — by a margin of 70 percent to 23 percent, becoming the first candidate to win all 95 counties in Tennessee since then-Gov.