OFF TO THE RACES: Trump expected to build on his delegate lead
The jumbled anti-Trump effort and the conflicting purposes of Cruz and Kasich mean Trump is set to build his delegate lead despite being in trouble in Utah, POLITICO notes.
Here's what to watch in tonight's contests in Arizona, Utah and Idaho.
Our latest NBC News | SurveyMonkey poll shows the national race between Sanders and Clinton virtually unchanged since last week.
And the poll on Trump: "Despite maintaining a plurality of support in the Republican primary contest for the past few months, Trump has failed to reach a majority of support among Republicans and Republican-leaning voters as the field continues to winnow."
CLINTON: From NBC's Ari Melber: "Air Force Reserve major Brad Podliska, a former investigator for the House Benghazi Committee, is dropping allegations that the committee unfairly targeted Hillary Clinton from his lawsuit against his former employer."
CRUZ: The Wall Street Journal reports on his campaign's efforts to work local party conventions to rack up potential delegates.
RUBIO: POLITICO reports that he rejected the idea of a unity ticket with Cruz.
SANDERS: He's aiming for a comeback in Arizona.
TRUMP: He's feuding with Elizabeth Warren, who called him a "loser" in a series of tweets. "Alarmed by the harsh attacks and negative tone of their presidential contest, broad majorities of Republican primary voters view their party as divided and a source of embarrassment and think that the campaign is more negative than in the past, according to a New York Times/CBS News national poll released on Monday." (And/but: Trump is at his highest level of support ever in the poll.)
NBC's Andrew Rafferty reports on Trump's uncharacteristically scripted speech at AIPAC.
More from the AP: "Confronting doubts about the depth of his knowledge of world affairs, Republican presidential front-runner Donald Trump delivered a sober speech to a pro-Israel crowd, outlining for the first time the team of foreign policy thinkers advising his campaign."
And from the Washington Post: "Donald Trump endorsed an unabashedly noninterventionist approach to world affairs Monday during a day-long tour of Washington, casting doubt on the need for the North Atlantic Treaty Organization and expressing skepticism about a muscular U.S. military presence in Asia. The foreign policy positions — outlined in a meeting with the editorial board of The Washington Post — came on a day when Trump set aside the guerrilla tactics and showman bravado that have powered his campaign to appear as a would-be presidential nominee, explaining his policies, accepting counsel and building bridges to Republican elites.
Buzzfeed reports on new allegations of bad behavior from Trump campaign manager Corey Lewandowski.
OBAMA AGENDA: Brussels attacks overshadow Cuba trip
NBCNews.com is following all the latest from the Brussels terror attacks here.
The latest on Obama's Cuba trip, via the AP: "Trying to nudge Cuba toward Democracy, President Barack Obama will decry political repression and economic deprivation and present a vision of closer ties with the U.S. bringing greater freedom and prosperity when he meets with dissidents and speaks to the Cuban people on Tuesday at the close of a trailblazing trip."
The Washington Post: "In an extraordinary news conference Monday afternoon, President Obama and Cuban President Raúl Castro sparred over human rights, the Guantanamo prison and their views of their own countries and the world, even as both hailed Obama's historic visit here as a new step in normalizing relations."
The New York Times notes that Chief Justice John Roberts spoke about polarization and the court just 10 days before Antonin Scalia died.