(CNN) — First lady Michelle Obama jumped into the White House fundraising spree on Thursday, prodding supporters in Chicago to hand over the maximum campaign contribution in an attempt to shore up Democrats' chances in upcoming midterm elections.

Her entreaty came as her husband, President Barack Obama, capped a three-day fundraising swing on the West Coast, bringing in millions of dollars for the committees charged with electing Democrats to office.

"We need you to write the biggest, fattest check that you can possibly write," Mrs. Obama told a crowd of donors in Chicago, her hometown. "Writing those checks is the single-most impactful thing that you can do right now."

FULL POST