SEATTLE (AP) — Michelle Obama has visited Seattle to help raise money for the president's re-election campaign.

Speaking Tuesday evening to a crowd of about 700 at the Seattle Westin, she asked supporters to "work like never before" from now until election day.

The Seattle Times reports that guests paid between $500 and $10,000 to attend the fundraiser.

On Wednesday night, the Obamas will mark their 20th wedding anniversary with the president's first debate with Republican rival Mitt Romney.

Mrs. Obama plans to be in the audience in Denver during the debate.

The president says he and his wife have planned a belated anniversary celebration on Saturday.