Today's installment of campaign-related news items from across the country.
* In New Hampshire, a new WBUR poll found Bernie Sanders with a big lead in the race for the Democratic presidential nomination, with 29% support. He's followed in the poll by Pete Buttigieg with 17%, Joe Biden with 14%, and Elizabeth Warren with 13%.
* With Russia again targeting our elections, I found this WSJ report interesting: "Nearly a dozen technology companies said they will provide free or reduced-cost cybersecurity services to presidential campaigns, which experts and intelligence officials have warned are ripe targets for intrusion and disinformation."
* We haven't seen too many examples of former Democratic presidential candidates endorsing current contenders, but self-help guru Marianne Williamson has thrown her support behind Andrew Yang.
* Our Revolution, a nonprofit organization created from Bernie Sanders' 2016 campaign operation, is facing an FEC complaint from Common Cause, following allegations of accepting improper contributions.
* Michael Bloomberg's presidential campaign has picked up a couple of new endorsements, including support from Rep. Bobby Rush (D-Ill.) and San Francisco Mayor London Breed (D).
* Gallup found a 79-point gap between Republicans and Democrats on Donald Trump's approval rating. That's the largest ever measured for any sitting president in an election year.
* And Rep. Tulsi Gabbard (D-Hawaii), whose presidential campaign hasn't broken through, filed suit this week against Hillary Clinton, accusing the former secretary of State of defaming her. Gabbard is seeking $50 million in damages.
MORE: Today's Maddowblog