Updated, 9:04 a.m. | TOPEKA, Kan. — With less than four weeks until Election Day, the National Republican Senatorial Committee's independent expenditure arm is shifting resources to increase its investment in six states, including South Dakota and Georgia. The NRSC has moved $1 million to South Dakota, plus another $1.45 million to Georgia. In South Dakota, the Democratic Senatorial Campaign Committee made a $1 million television ad buy this week, on the heels of tightening poll numbers that showed its candidate, Rick Weiland, gaining ground. In Georgia, a new poll suggests a runoff is likely. (more…)