Each of the committees the DSCC registered include different participants, although six candidates and the DSCC are included in both committees.

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The six benefiting from both are Sens. Amy KlobucharAmy Jean KlobucharOvernight Cybersecurity: Senators eye path forward on election security bill | Facebook isn't winning over privacy advocates | New hacks target health care Senators chart path forward on election security bill GOP poised to advance rules change to speed up Trump nominees MORE (Minn.), Maria CantwellMaria Elaine CantwellKamala Harris will no longer accept corporate PAC money Can Silicon Valley expect European-style regulation here at home? Lobbying World MORE (Wash.), and Kirsten GillibrandKirsten Elizabeth GillibrandGillibrand's jobs plan another federal program we don't need Kamala Harris will no longer accept corporate PAC money Schumer to introduce bill to decriminalize marijuana MORE (N.Y.), Hawaii Senate candidate Rep. Mazie HironoMazie Keiko HironoFormer Sen. Daniel Akaka of Hawaii dies at 93 Dems to top DOJ officials: Publicly promise not to interfere in Mueller's probe Zinke defends use of Japanese word: How could saying good morning 'be bad'? MORE, Wisconsin Senate candidate Rep. Tammy BaldwinTammy Suzanne BaldwinVulnerable Senate Dems have big cash advantages Dem senators unveil expanded public option for health insurance Dem senators call on FCC to protect against robocalls MORE and Nevada Senate candidate Rep. Shelley Berkley (Nev.). Of those, Berkley and Baldwin have the toughest races.

The joint fundraising committee designated with the New York address also benefits Sen. Claire McCaskillClaire Conner McCaskillRand's reversal advances Pompeo Pompeo headed for confirmation after surprise panel vote Donnelly becomes third Dem to support Pompeo MORE (Mo.), who is a top GOP target and considered one of the most vulnerable Democrats this cycle, along with North Dakota Senate candidate Heidi HeitkampMary (Heidi) Kathryn HeitkampRand's reversal advances Pompeo Overnight Health Care: Teen pregnancy program to focus on abstinence | Insurers warn against short-term health plan proposal | Trump VA pick faces tough sell Overnight Defense: Pompeo clears Senate panel, on track for confirmation | Retired officers oppose Haspel for CIA director | Iran, Syria on agenda for Macron visit MORE. The Washington committee includes Sen. Dianne FeinsteinDianne Emiel FeinsteinThis week: Senate barrels toward showdown over Pompeo Sunday Shows Preview: Emmanuel Macron talks ahead of state dinner CIA declassifies memo on nominee's handling of interrogation tapes MORE (Calif.), according to disclosure documents.

There are six women incumbents running for reelection in the Senate and five who would be the first female senators in their states, if elected.

Joint fundraising committees are commonly used to help fill the campaign coffers. The money is distributed at the committee's discretion as long as the contributions stay within federal limits.

Adriane Rummel is the treasurer for both committees and is based out of the DSCC’s Washington, D.C., address, according to the FEC filings.

— This story was updated at 12:19 p.m.