Articles by Kurtzleben, Danielle
The Republican Senate committee comes in second.
While many top super PACs favor Democrats, Karl Rove's group has outspent them all.
Groups flush with coin and agendas are flooding voters with a plethora of ads.
Shifts focus from big expenditures to bus tour.
Healthcare, gun control measure round out top three.
Allied outside groups also make final push to Election Day.
Controversial GOPer contributed $750,000 more to other campaigns than any of his colleagues.
Senate Democrats spend third most last week.
Healthcare law, cost of living adjustment also drive interest.
Small business jobs bill, continuing resolution round out top three.