Wednesday'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:
* Senate Minority Leader Mitch McConnell's (R-Ky.) campaign spent much of the day yesterday apologizing for its ad featuring Duke's basketball team, then had to apologize again for using footage of Louisville and Kentucky basketball, which infuriated the non-partisan NCAA.
* Speaking of Senate campaign apologies, Rep. Bruce Braley (D-Iowa) scrambled to apologize after a video surfaced showing the Senate candidate saying, in reference to Sen. Chuck Grassley (R-Iowa), the chamber could end up with "a farmer from Iowa who never went to law school, never practiced law, serving as the next chair of the Senate Judiciary Committee."
* American Encore, a group founded by Sean Noble, who presided over a Koch-funded network, is running attack ads against Sen. Al Franken (D) in Minnesota, complaining about his efforts to limit political activities of non-profit dark-money organizations.
* In New Mexico, Public Policy Polling shows Gov. Susana Martinez (R) ahead in her re-election bid, but not by a huge margin. She leads Democratic challenger, Gary King, in the poll by five points, 47% to 42%.
* In the same poll, Sen. Tom Udall (D) looks like a safe bet for a second term, leading his Republican opponents by 20 or more points in hypothetical match-ups.
* Sen. Mark Begich (D), facing a much tougher re-election race in Alaska, has joined a small group of congressional Democrats who endorse expanding Social Security benefits beyond current levels.
* Billionaire casino magnate Sheldon Adelson helped bankroll Newt Gingrich's failed presidential campaign in 2012, but he's nevertheless ready to finance a new GOP favorite in 2016. He's not sure which candidate he'll back, but Adelson says he'll focus on electability.
* And in Maine, Sen. Susan Collins (R) is generally considered a pretty safe bet for another term, but she's not running unopposed -- with the filing deadline now passed, the Democratic Senatorial Campaign Committee threw its formal support to Shenna Bellows, who's running a very progressive campaign.