But the GOP’s advantage in super-PAC spending forced some incumbents to spend heavily early.
Bruce Braley (D) and Joni Ernst (R) are tied, but Jeanne Shaheen (D-N.H.) leads Scott Brown.
Dems hope she can help them hold on to blue-collar voters in red states.
Club for Growth president says case to challenge Thad Cochran's runoff win isn't clear.
Dem challenger to GOP Senate Leader Mitch McConnell is continuing her rapid fundraising.
The vulnerable Democrat raked in $2.1 million to Rep. Bill Cassidy's (R-La.) $1.6 million.
Michelle Nunn (D) raised $3.45 million, besting both of her GOP Senate opponents combined.
Warren ripped Wall Street while appearing with Natalie Tennant.
New NBC surveys in blue-leaning states are boost to Democrats' hopes of keeping the Senate.
Republican outside group launches an ad attacking Democrat Braley as the GOP nominee is off the trail.