SATURDAY’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 Obama campaign unveiled a two-minute ad this morning that emphasizes Obama’s economic plan and how he’d pay for it. McCain and Bush aren’t mentioned.

* The National Republican Senatorial Committee has officially given up on winning Colorado’s open U.S. Senate seat, which obviously spells trouble for Bob Schaffer.

* In other Senate news, Obama cut a new TV ad for Oregon’s Jeff Merkley, the first commercial Obama has done for a Democratic Senate candidate this year.

* In Ohio, a new Ohio Newspaper Poll shows Obama leading McCain by three, 49% to 46%. A month ago, this same poll showed McCain up by two.

* In Colorado, a new Rocky Mountain News/CBS4 poll shows Obama leading McCain by 12, 52% to 40%.

* In New Hampshire, Rasmussen shows Obama leading McCain by four, 50% to 46%.

* In Iowa, Rasmussen shows Obama leading McCain by eight, 52% to 44%.

* Nationally, Newsweek shows Obama leading McCain by 12, 53% to 41%.

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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.