Cash is king in the Old Pueblo, with the top two candidates in Congressional District 2 raising roughly $864,000 in the last three months.
Republican Martha McSally has raised $441,105 in the first three months of 2014, according to recent filings with the Federal Elections Commission.
A spokesperson with National Republican Congressional Committee, Daniel Scarpinato said the amount McSally has raised in the last fiscal cycle was the highest in the country for a Republican challenger.
McSally has raised over $1.2 million since announcing last year she would challenge Barber for a second time. She currently has $847,142 cash on hand.
Rep. Ron Barber, who narrowly defeated McSally in 2012, raised slightly less in the first quarter, bringing in $422,799.
The Tucson Democrat currently has $1.2 million cash on hand.
Two other Republicans running for the GOP nod in the primary, Shelley Kais and Chuck Wooten each raised less than $7,000 in the first three months of 2014.
Republican Jim Brown, who announced he would run in CD2 a few months after saying he was in the CD1 race, has not filed any reports with the FEC.
The district, considered to be one of of the most competitive in the entire country, has attracted an early rounds of television ads on Tucson and Phoenix, sponsored by outside parties including the Libre Initiative and House Majority PAC in the last few months.
Contributions into both Barber's and McSally's campaign coffers are a mix of donations from private individuals, PACs and what the FEC calls "other authorized committees."
The latter can refer contributions from other political candidates as well as some committees the FEC doesn't classify as a PAC.
The McSally Tobin Victory Fund, which brought House Speaker John Boehner to Tucson last month, kicked in more than $17,500 into McSally's campaign war chest.
Read more in tomorrow's Arizona Daily Star.