Michelle ObamaMichelle ObamaMichelle responds to Barack with her own Valentine's tweet Obamas' former Harvard law professor: Michelle should have been president Obamas sign with agency for speaking gigs MORE has expanded her fundraising schedule, adding three events for the Democratic Party to her calendar this week.

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The first lady will headline three fundraisers for the Democratic National Committee (DNC) at private homes in Washington on Tuesday. The events are closed to press, and no further details were released.

The newly announced events are in addition to a previously scheduled one — a fundraiser for Virginia gubernatorial candidate Terry McAuliffe on Thursday.

Obama did three fundraising events last week: one in Boston for Massachusetts Senate candidate Rep. Edward MarkeyEd MarkeyOvernight Tech: GOP chairman to propose high-skilled visa overhaul | Zuckerberg's 5,700 word letter | Tech lobbies gear up ahead of internet fight Senate Dem blasts GOP for trying to repeal broadband privacy rules Judge orders release of EPA nominee’s emails MORE (D) and two events for the DNC in New York.

The first lady's approval ratings are consistently higher than her husband's, and she was a popular presence in his 2012 reelection campaign: both on the hustings and in fundraisers. 

During the 2012 race, Bloomberg Businessweek referred to the first lady as President Obama's "secret weapon" and noted she brought in at least $5.1 million at 12 fundraisers in August of that year. 

She held multiple fundraising events for the party during the presidential cycle.

Her fundraising schedule this year has been more subdued and indicates the races Democrats think are important: Markey is in a tough race for Secretary of State John KerryJohn KerryFormer Obama officials say Netanyahu turned down secret peace deal: AP How dealmaker Trump can resolve the Israeli-Palestinian conflict John Kerry to teach at Yale on global issues MORE's former Senate seat. And McAuliffe, the former head of the party who has close ties to the Clintons, is in a tight contest in Virginia against Republican Ken Cuccinelli, the state's attorney general.