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.

* In Pennsylvania, the latest Franklin and Marshall College survey shows a very close Senate race. Far-right former Rep. Pat Toomey (R) leads Sen. Arlen Specter (D) by four, 33% to 29%, but another third of poll respondents described themselves as undecided.

* Speaking of close Senate races, Public Policy Polling shows former Bush Budget Director Rob Portman (R) holding onto modest leads over his top Democratic challengers, Lt. Gov. Lee Fisher and Ohio Secretary of State Jennifer Brunner.

* A new poll from the Public Policy Institute of California shows Carly Fiorina with the narrowest of leads over Tom Campbell in their Senate primary, though other recent polls have shown Campbell ahead.

* The attack ads are getting a little more intense in Florida between Senate hopefuls Marco Rubio and Gov. Charlie Crist, as part of their Republican primary.

* In a bit of a surprise, Dan Senor, the former spokesperson for the Coalition Provisional Authority in Iraq, announced yesterday he will not take on Sen. Kirsten Gillibrand (D-N.Y.) this year. Senor had already taken some preliminary steps towards launching a campaign.

* As expected, former Maryland Gov. Bob Ehrlich (R) will seek a rematch against incumbent Gov. Martin O’Malley (D) this year. Republicans didn’t really have anyone else interested in running.

* Rep. Stephanie Herseth Sandlin (D-S.D.) dodged one primary opponent this week, but picked up another. Yesterday, Dr. Kevin Weiland said he would take on the incumbent, motivated in part by her opposition to the Affordable Care Act.

* And once again, Gen. David Petraeus isn’t going to be a candidate for public office.

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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.