Today's installment of campaign-related news items from across the country.
* The new Washington Post/ABC News poll shows Hillary Clinton holding onto a large lead over Bernie Sanders at the national level, 60% to 34%, in the race for the Democratic nomination. Martin O’Malley is a distant third with 3%.
* With Sen. David Vitter (R-La.) retiring from public office next year, a long list of Republicans is already eyeing his seat, including Reps. Charles Boustany and John Fleming, state Treasurer John Kennedy, retired Air Force Col. Rob Maness, and Public Service Commissioner Scott Angelle. Democrats will likely turn their attention to New Orleans Mayor Mitch Landrieu, whose interest is unclear.
* The new Boston Globe/Suffolk poll shows Donald Trump with a significant lead in the New Hampshire Republican primary, but the same poll found that if Mitt Romney ran, he'd easily be the frontrunner in the Granite State. In this hypothetical scenario, Romney would have 31% of the state GOP's support, compared to Trump's 15%.
* Marco Rubio has unveiled his first national television ad, focusing entirely on the recent attack in Paris, which the senator tells viewers “could happen here.” It's scheduled to run on cable networks, though the campaign has not announced the size of the ad buy.
* Speaking of Rubio, the Floridian senator picked up another congressional endorsement late last week, when Rep. Markwayne Mullin (R-Okla.) threw his support to the GOP presidential candidate.
* New Hampshire's largest public-employee union has thrown its support to Bernie Sanders, even after SEIU at the national level has endorsed Hillary Clinton.
* And in Wisconsin's closely watched U.S. Senate race, the latest Marquette University poll shows former Sen. Russ Feingold (D) with a double-digit lead over incumbent Sen. Ron Johnson (R), 49% to 38%.