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:

* McCain blew off David Letterman last night, but made time for Katie Couric. Letterman wasn’t happy about this, and questioned the McCain campaign’s new tactics. “This just doesn’t smell right. This is not the way a tested hero behaves,” Letterman told his audience. “Somebody’s putting something in his Metamucil.”

* Republican candidates in Washington State are trying to avoid listing their party affiliation on the November ballot as “Republican.” Yesterday, the state Democratic Party filed a lawsuit on the matter.

* In two new national polls, NBC/WSJ shows Obama up by two, 48% to 46%, while Bloomberg/LAT shows Obama up by four, 49% to 45%.

* In Michigan, Time/CNN shows Obama leading McCain by five, 51% to 46%, while NBC News shows the two tied at 46% each.

* In Colorado, Time/CNN shows Obama leading McCain by four, 51% to 47%, and Rasmussen shows Obama up by three, 50% to 47%.

* In Pennsylvania, Time/CNN shows Obama leading McCain by nine, 53% to 44%.

* In North Carolina, Rasmussen shows Obama leading McCain by two, 49% to 47%.

* In New Hampshire, Rasmussen shows McCain leading Obama by two, 49% to 47%.

* In Wisconsin, Research 2000 shows Obama leading McCain by six, 49% to 43%.

* In West Virginia, Time/CNN shows McCain leading Obama by four, 50% to 46%.

* In Montana, Time/CNN shows McCain leading Obama by 11, 54% to 43%.

* In Alabama, Rasmussen shows McCain leading Obama by 21, 60% to 39%.

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.