Monday's campaign round-up

Today's installment of campaign-related news items that won't necessarily generate a post of their own, but may be of interest to political observers:
* The U.S. Senate race in Mississippi got a lot more interesting over the weekend when former Rep. Travis Childers, a conservative Democrat who represented a safely "red" district, announced he's running, too. Incumbent Sen. Thad Cochran is in the middle of a tough primary against state senator Chris McDaniel.
* Speaking of Mississippi, former Rep. Gene Taylor is switching parties, becoming a Republican, and running against Rep. Steve Palazzo in a Republican primary. Palazzo narrowly defeated Taylor in 2010.
* There was some chatter last week that Facebook COO Sheryl Sandberg was planning a Senate campaign, but the rumors were apparently untrue.
* Democrats finally have a candidate to run for the U.S. Senate in Kansas, with Shawnee County District Attorney Chad Taylor entering the race late last week. In the meantime, incumbent Sen. Pat Roberts is facing a GOP primary fight against Milton Wolf.
* In Colorado, the Republican gubernatorial field is expected to grow even more, with former Rep. Bob Beauprez poised to launch a campaign. This will be Beauprez's second attempt, following his defeat in the 2006 race.
* And in Idaho, Rep. Mike Simpson (R) is facing a primary fight against Republican attorney Bryan Smith, and the U.S. Chamber of Commerce is trying to bolster the incumbent. The business lobby is poised to run new ads targeting Smith as a "trial lawyer" who opposed efforts to curtail frivolous lawsuits.