Today's installment of campaign-related news items from across the country.
* The latest PPP poll in New Hampshire shows Hillary Clinton narrowly leading Bernie Sanders, 47% to 44%, with Martin O'Malley trailing with 3%. Clinton fares very well among Democrats; Sanders fares just as well with independents planning to vote in the Democratic primary.
* Does Vice President Biden regret his decision not to run for president? "I regret it every day," he said yesterday, "but it was the right decision for my family and me."
* Clinton unveiled additional details on her autism initiative this week, and Roll Call reports that experts are "optimistic" that her agenda would make a significant difference.
* I don't much care about Marco Rubio relying heavily on private jets, but I think it's a shame his campaign told reporters for months that the Florida senator flies commercial -- and sits in coach.
* Speaking of Rubio, Rand Paul is also turning his attention to his Florida colleague, arguing yesterday, "I think Rubio is the weakest candidate on national defense because he's weak on border security."
* The DNC is launching its first Spanish-language video of the cycle, hitting Republicans on, of all things, guns. "The majority of gun owners support universal background checks," the ad says. "But all of the Republican candidates oppose the prevention of firearm violence."
* In Virginia, Rep. Dave Brat (R), who won one of the biggest primary upsets in modern history in 2014, will face a primary challenge of his own this year from Henrico County Sheriff Mike Wade (R).
* Former New Mexico Gov. Gary Johnson has decided to run for president again. The former Republican will again seek the Libertarian Party's nomination.
* And in Alaska, failed Senate candidate Joe Miller (R), who came up short against Sen. Lisa Murkowski's (R) write-in bid six years ago, hasn't ruled out a 2016 rematch.