THURSDAY’S CAMPAIGN ROUND-UP….Today’s installment of campaign-related news items that wouldn’t generate a post of their own, but may be of interest to political observers.

* RNC committeewoman Ada Fisher this morning became the first RNC member to call on Michael Steele to resign as party chairman.

* Former Florida House Speaker Marco Rubio has formed an exploratory committee and appears to be the first top-tier Republican to enter the 2010 Senate race in Florida.

* In Kentucky, Sen. Jim Bunning’s (R) approval rating is down to 41%.

* Lake Research Partners, a Democratic polling firm, conducted a survey showing state Attorney General Jerry Brown (D) with an edge in California’s upcoming gubernatorial campaign. Mayors Gavin Newsom and Antonio Villaraigosa also did well in the poll, and all three fare well against the likely Republican candidates.

* To the disappointment of the DCCC, Michigan House Speaker Andy Dillon (D) has decided not to take on Rep. Thaddeus McCotter (R-Mich.) next year. Dillon is, however, considering a gubernatorial campaign.

* Club for Growth issued its first endorsement of the 2010 cycle yesterday, announcing its support for Rep. Mary Fallin’s (R) gubernatorial campaign in Oklahoma.

* William Daley, the former commerce secretary and brother to Chicago’s mayor, is apparently planning a Senate campaign in Illinois next year.

* Sen. Chuck Grassley (R) is dismissing rumors that he might run for governor in Iowa next year.

* And Ned Lamont is thinking about running for governor in Connecticut next year. The incumbent, Gov. M. Jodi Rell (R), has not yet announced whether she plans to seek re-election, but if she does run, she’ll be favored to win.

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Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.