MONDAY’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.

* Former Rep. Rob Portman (R) will announce today that he’s running for George Voinovich’s Senate seat, now that the incumbent has said he’s retiring.

* Roland Burris’ Senate appointment seems exceedingly likely at this point.

* Caroline Kennedy had a formal interview with Gov. David Paterson over the weekend, discussing New York’s vacancy in the Senate.

* On a related note, Rasmussen found that if Kennedy is appointed and runs against Rep. Peter King (R) for a full term, she would be the heavy favorite.

* In Florida, former House Speaker Marco Rubio (R) is gearing up to run for the Senate in 2010, while former congressman and MSNBC host Joe Scarborough isn’t.

* A Fairleigh Dickinson-PublicMind Poll shows New Jersey Gov. Jon Corzine (D) leading former U.S Attorney Chris Christie in a hypothetical match-up, 40% to 33%.

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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.