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 KlobucharWHIP LIST: How many Dems will back Sessions? Live coverage: The Senate's 'vote-a-rama' Schumer: If Trump agrees Russia behind hacking, let's boost sanctions MORE (Minn.), Maria CantwellMaria CantwellDems seek more vetting for Trump nominees before hearings Four Washington electors refuse to vote for Clinton Dems concerned Trump trying to 'target' Energy Dept. employees MORE (Wash.), and Kirsten GillibrandKirsten GillibrandOvernight Defense: Mattis cruises through confirmation hearing Mattis cruises through confirmation hearing Senate teeing up Mattis waiver MORE (N.Y.), Hawaii Senate candidate Rep. Mazie HironoMazie HironoLawmakers condemn Trump for attack on John Lewis LGBT groups 'heartened' by Mattis' testimony Mattis cruises through confirmation hearing MORE, Wisconsin Senate candidate Rep. Tammy BaldwinTammy BaldwinTrump, House GOP could clash over 'Buy America' WHIP LIST: How many Dems will back Sessions? Trump’s infrastructure plan: What we know 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 McCaskillGOP must avoid Dems' mistakes when replacing ObamaCare Live coverage: Mattis confirmation hearing for Pentagon Mattis's views on women in combat takes center stage 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 HeitkampHeidi HeitkampDems prepare to face off with Trump's pick to lead EPA Four takeaways from Carson's confirmation hearing Live coverage: The Senate's 'vote-a-rama' MORE. The Washington committee includes Sen. Dianne FeinsteinDianne FeinsteinFeinstein: Russia's interference affected outcome of election 'Future of America' at stake with hacking, Feinstein says Sunday shows preview: Trump allies appear after John Lewis criticism 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.