Former Rep. Rob Portman (R-Ohio) raised $2.65 million in the second quarter for his Senate campaign. That leaves him with $8.8 million cash on hand, according to the campaign. 

Portman's Democratic opponent, Lt. Gov. Lee Fisher has not yet reported his second quarter numbers, but his fundraising was well behind Portman last quarter. Fisher raised some $550,000 in the first quarter to Portman's $2.35 million.

Fisher's campaign is also facing questions over just how unified Democrats are behind his candidacy, as The Hill campaign reporter Sean Miller reported Wednesday.  

Polls show the race is tight. A Rasmussen poll from the end of June gave Portman a four-point edge, while a PPP survey showed Fisher ahead by two.