President Obama’s campaign manager David Plouffe endorsed Ohio Lt. Gov. Lee Fisher in a fundraising e-mail for the Democrat’s Senate campaign.

“I get asked quite a bit what I think the most important campaigns in 2010 will be. And the Ohio Senate race is always near the top of my list,” Plouffe wrote. “That’s why I’m supporting Lee Fisher.”

Perhaps Plouffe is just working overtime, but his firm — AKPD Message and Media ‘– also does media consulting for Fisher, who is the front-runner in the Democratic primary where he faces Secretary of State Jennifer Brunner. According to campaign finance reports, the Fisher campaign had paid more than $3,100 for media production to AKPD so far this cycle through Sept. 30.

According to a top Fisher aide, the campaign approached Plouffe independently about writing an e-mail in support of their candidate. The Fisher aide also said Plouffe has not worked on any campaigns this fall and instead has been traveling to promote his book, “The Audacity to Win.”