FRIDAY’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.

* While Rep. Carolyn Maloney (D) is considered a top primary challenged for Sen. Kirsten Gillibrand (D) in New York next year, the incumbent may have more than one opponent. Yesterday, labor activist Jonathan Tasini, perhaps best known in campaign circles for an unsuccessful challenge against Hillary Clinton in 2006, is now taking on Gillibrand.

* Rep. Roy Blunt’s (R) Senate campaign in Missouri caught a break yesterday when Thomas Schweich announced that he’s not running, despite encouragement from GOP leaders such as Jack Danforth, and will support Blunt next year.

* In Wisconsin, a new Research 2000 poll for Daily Kos shows incumbent Gov. Jim Doyle (D) with fairly strong leads over some of his likely Republican challengers next year, but there are a couple of warning signs. First, Doyle is running below 50%. Second, should former Gov. Tommy Thompson (R) seek his old job, the race is a toss-up.

* Speaking of Wisconsin, there are a few vulnerable Senate Democrats seeking re-election next year. Sen. Russ Feingold (D) isn’t one of them.

* It’s looking more and more like Rep. Mike Castle (R-Del.) will run for the Senate next year. Yesterday, he declined an offer to become the top Republican on the House Education and Labor Committee.

* And in Iran, it’s too soon to know who’ll win the country’s presidential election, but I found it interesting to read that the chief campaign strategist for Mir Hossein Mousavi, the main challenger to Mahmoud Ahmadinejad, “obsessively” studied Barack Obama’s presidential campaign. The WSJ reported, “To pursue young voters, Mr. Jalaeipour created pages on social-networking sites such as Facebook and asked supporters to make their profile picture green, the color of the campaign. He commissioned movie stars to make a video clip in support of Mr. Mousavi and posted it on YouTube and elsewhere.”

Steve Benen

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.