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.

* There may be more than one reason for this, but Senate Minority Leader Mitch McConnell (R-Ky.) noted this morning that he will not travel to Nevada this year to campaign against Senate Majority Leader Harry Reid (D). Indeed, McConnell was unequivocal: “I am not going to Nevada.”

* If you’re inclined to believe Rasmussen, the pollster finds former Bush budget director Rob Portman leading Ohio’s Senate race by four, topping Lt. Gov. Lee Fisher (D), 44% to 40%.

* On a related note, Rasmussen also shows the GOP leading in Ohio’s gubernatorial race, with former Rep. John Kasich (R) up by three over incumbent Gov. Ted Strickland (D), 45% to 42%.

* In still more Rasmussen-related news, the pollster finds Sen. Barbara Boxer (D) leading failed HP CEO Carly Fiorina (R) in California, 45% to 40%.

* In Kentucky, Lt. Gov. Daniel Mongiardo (D) yesterday endorsed state Attorney General Jack Conway’s (D) Senate campaign, but he didn’t seem especially happy about it — Conway defeated Mongiardo in a rather bitter primary fight.

* In Connecticut, a new Quinnipiac poll shows Ned Lamont leading Dan Malloy in the Democratic gubernatorial primary, 45% to 40%. The same poll finds Tom Foley as the leading Republican candidate in the race.

* And in Michigan, a Republican primary in Rep. Bart Stupak’s (D) House district is coming down to literally just one vote. Something to consider the next time someone says one vote can’t make a difference.

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.