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.

* The “purity test” to be considered by the Republican National Committee looks to be in trouble. Yesterday, RNC Chairman Michael Steele announced his formal opposition and state party chairs voted unanimously to kill the proposal.

* It appears that Rep. John Boozman (R) will soon announce his retirement from the House to run against Sen. Blanche Lincoln (D) in Arkansas this year. A formal decision is expected by the weekend.

* In Illinois, the latest survey from Public Policy Polling shows state Treasurer Alexi Giannoulias (D) leading Rep. Mark Kirk (R) in this year’s U.S. Senate race, 42% to 34%. In hypothetical match-ups, Kirk fares better against the other Democratic candidates. Both parties will host primary contests next week.

* A new poll from the Public Policy Institute of California shows former Rep. Tom Campbell (R) trailing Sen. Barbara Boxer (D) by just four points, 45% to 41%.

* Former Wisconsin Gov. Tommy Thompson (R) hasn’t moved any closer to running for the Senate against incumbent Sen. Russ Feingold (D), but Rasmussen shows Thompson leading if he runs.

* And White House Chief of Staff Rahm Emanuel is still annoyed by the recent results in Massachusetts, telling CBS News’ Katie Couric yesterday, “I don’t want to re-litigate this, but there is no doubt in my mind we could have won that race.”

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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.