TUESDAY’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.

* It’s a huge primary day today, with key contests, up and down the ballot, in Colorado, Connecticut, Georgia, and Minnesota.

* Whoever wins the gubernatorial primaries in Minnesota, it looks like the presumptive Republican nominee, Tom Emmer, will be the underdog in November. The latest SurveyUSA poll shows former U.S. Sen. Mark Dayton (D) leading Emmer in a hypothetical match-up, 46%-32%

* In Delaware, Rep. Mike Castle (R) still leads Chris Coons (D) by a healthy margin. A new DailyKos/Public Policy Polling survey shows the Republican leading, 48% to 35%, which actually seems a little closer than expected to me.

* The three-way contest in Rhode Island’s gubernatorial race has led to a very competitive race. The latest poll from Brown University shows Frank Caprio (D) leading Lincoln Chafee (I) by just one point.

* In Illinois’ increasingly bizarre Senate race, Rep. Mark Kirk (R) is now suggesting, through some odd degrees of separation, that Alexi Giannoulias’ (D) family’s bank is somehow connected to Saddam Hussein.

* And in Connecticut, Sen. Joe Lieberman (I) said he’s “probably” running for re-election in 2012, but he hasn’t “decided fully.” Markos Moulitsas noted in response, “I live in perpetual fear that Joe Lieberman will retire, thus depriving us the opportunity to help kick him to the curb.”

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.