Today's installment of campaign-related news items from across the country.
* In Iowa, the new Quinnipiac poll shows Bernie Sanders with the edge over Hillary Clinton, 49% to 45%.
* At the national level, a new Washington Post/ABC News poll shows Clinton leading Sanders by nearly 20 points, 55% to 36%.
* At an Iowa event yesterday, Donald Trump welcomed an endorsement from Joe Arpaio, the controversial right-wing sheriff in Maricopa County, Arizona.
* Chris Christie doesn't apologize often, but he apologized yesterday to the mayor of North Wildwood, "whom he referred to the night before as 'crazy.'"
* Jeb Bush's super PAC has slammed Marco Rubio repeatedly over his previous support for the bipartisan immigration reform package, but this week, Right to Rise is also hitting Rubio over the senator's misuse of a party credit card in Florida.
* Ted Cruz's favorability ratings have taken a sharp turn for the worse over the last couple of weeks, coinciding with his escalating feud with Trump.
* President Obama and Bernie Sanders don't have a strong personal relationship, but the senator will visit the White House today for a private meeting. Their chat will reportedly be held in the Oval Office.
* And while presidential endorsements are common at this point in the campaign process, the U.S. Hispanic Chamber of Commerce this week made a vice presidential endorsement, urging the Democratic nominee to select HUD Secretary Julian Castro for the ticket.