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.
Tennessee state Rep. Joe Carr has picked up the conservative talk-radio host's endorsement.
Thomas Ravenel filed 17,000 signatures on Monday, topping 10,000 needed for the S.C. ballot.
At end of day, Portman predicts "bare majority" for GOP.
Kingston and Perdue used the lone opportunity ahead of next Tuesday to wage personal attacks.