The latest news on Sestak, Joe
While many top super PACs favor Democrats, Karl Rove's group has outspent them all.
Republicans gain in Pennsylvania, Nevada, and Florida.
Pennsylvania voters who think they've heard it all in the Senate fight should brace for a final earful.
The economy is driving voter preferences this year.
New polls show vulnerable House Democrats as well.
Allied outside groups also make final push to Election Day.
Close House races in Democratic seats.
Early voting starts as voters remain unhappy with members of Congress.
President's approval rating reached a new low in the last quarter.
Senate Democrats spend third most last week.